FINERACT-1971: Fix next payment due date loan delinquent detail
diff --git a/fineract-core/src/main/java/org/apache/fineract/infrastructure/configuration/domain/ConfigurationDomainService.java b/fineract-core/src/main/java/org/apache/fineract/infrastructure/configuration/domain/ConfigurationDomainService.java
index d2bf2c2..579b5e2 100644
--- a/fineract-core/src/main/java/org/apache/fineract/infrastructure/configuration/domain/ConfigurationDomainService.java
+++ b/fineract-core/src/main/java/org/apache/fineract/infrastructure/configuration/domain/ConfigurationDomainService.java
@@ -141,4 +141,6 @@
 
     String getAccrualDateConfigForCharge();
 
+    String getNextPaymentDateConfigForLoan();
+
 }
diff --git a/fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/Loan.java b/fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/Loan.java
index e89880f..dbd14e8 100644
--- a/fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/Loan.java
+++ b/fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/Loan.java
@@ -190,6 +190,8 @@
     public static final String WRITTEN_OFF_ON_DATE = "writtenOffOnDate";
     public static final String FEE = "fee";
     public static final String PENALTIES = "penalties";
+    public static final String EARLIEST_UNPAID_DATE = "earliest-unpaid-date";
+    public static final String NEXT_UNPAID_DUE_DATE = "next-unpaid-due-date";
     /** Disable optimistic locking till batch jobs failures can be fixed **/
     @Version
     int version;
@@ -3624,7 +3626,40 @@
         return isChronologicallyLatestRepaymentOrWaiver;
     }
 
-    public LocalDate possibleNextRepaymentDate() {
+    public LocalDate possibleNextRepaymentDate(final String nextPaymentDueDateConfig) {
+        LocalDate nextPossibleRepaymentDate = null;
+        if (EARLIEST_UNPAID_DATE.equalsIgnoreCase(nextPaymentDueDateConfig)) {
+            nextPossibleRepaymentDate = getEarliestUnpaidInstallmentDate();
+        } else if (NEXT_UNPAID_DUE_DATE.equalsIgnoreCase(nextPaymentDueDateConfig)) {
+            nextPossibleRepaymentDate = getNextUnpaidInstallmentDueDate();
+        }
+        return nextPossibleRepaymentDate;
+    }
+
+    private LocalDate getNextUnpaidInstallmentDueDate() {
+        LocalDate nextUnpaidInstallmentDate = null;
+        List<LoanRepaymentScheduleInstallment> installments = getRepaymentScheduleInstallments();
+        LocalDate currentBusinessDate = DateUtils.getBusinessLocalDate();
+        LocalDate expectedMaturityDate = determineExpectedMaturityDate();
+
+        for (final LoanRepaymentScheduleInstallment installment : installments) {
+            boolean isCurrentDateBeforeInstallmentAndLoanPeriod = DateUtils.isBefore(currentBusinessDate, installment.getDueDate())
+                    && DateUtils.isBefore(currentBusinessDate, expectedMaturityDate);
+            if (installment.isDownPayment()) {
+                isCurrentDateBeforeInstallmentAndLoanPeriod = DateUtils.isEqual(currentBusinessDate, installment.getDueDate())
+                        && DateUtils.isBefore(currentBusinessDate, expectedMaturityDate);
+            }
+            if (isCurrentDateBeforeInstallmentAndLoanPeriod) {
+                if (installment.isNotFullyPaidOff()) {
+                    nextUnpaidInstallmentDate = installment.getDueDate();
+                    break;
+                }
+            }
+        }
+        return nextUnpaidInstallmentDate;
+    }
+
+    private LocalDate getEarliestUnpaidInstallmentDate() {
         LocalDate earliestUnpaidInstallmentDate = DateUtils.getBusinessLocalDate();
         List<LoanRepaymentScheduleInstallment> installments = getRepaymentScheduleInstallments();
         for (final LoanRepaymentScheduleInstallment installment : installments) {
diff --git a/fineract-provider/src/main/java/org/apache/fineract/infrastructure/configuration/domain/ConfigurationDomainServiceJpa.java b/fineract-provider/src/main/java/org/apache/fineract/infrastructure/configuration/domain/ConfigurationDomainServiceJpa.java
index 3cb8a4b..58b0bf3 100644
--- a/fineract-provider/src/main/java/org/apache/fineract/infrastructure/configuration/domain/ConfigurationDomainServiceJpa.java
+++ b/fineract-provider/src/main/java/org/apache/fineract/infrastructure/configuration/domain/ConfigurationDomainServiceJpa.java
@@ -53,6 +53,8 @@
     private static final String REPORT_EXPORT_S3_FOLDER_NAME = "report-export-s3-folder-name";
 
     public static final String CHARGE_ACCRUAL_DATE_CRITERIA = "charge-accrual-date";
+    public static final String NEXT_PAYMENT_DUE_DATE = "next-payment-due-date";
+
     private final PermissionRepository permissionRepository;
     private final GlobalConfigurationRepositoryWrapper globalConfigurationRepository;
     private final PlatformCacheRepository cacheTypeRepository;
@@ -516,4 +518,15 @@
         return value;
     }
 
+    @Override
+    public String getNextPaymentDateConfigForLoan() {
+        String defaultValue = "earliest-unpaid-date";
+        final GlobalConfigurationPropertyData property = getGlobalConfigurationPropertyData(NEXT_PAYMENT_DUE_DATE);
+        String value = property.getStringValue();
+        if (StringUtils.isBlank(value)) {
+            return defaultValue;
+        }
+        return value;
+    }
+
 }
diff --git a/fineract-provider/src/main/java/org/apache/fineract/portfolio/delinquency/service/DelinquencyReadPlatformServiceImpl.java b/fineract-provider/src/main/java/org/apache/fineract/portfolio/delinquency/service/DelinquencyReadPlatformServiceImpl.java
index b80b51e..ac8cca7 100644
--- a/fineract-provider/src/main/java/org/apache/fineract/portfolio/delinquency/service/DelinquencyReadPlatformServiceImpl.java
+++ b/fineract-provider/src/main/java/org/apache/fineract/portfolio/delinquency/service/DelinquencyReadPlatformServiceImpl.java
@@ -26,6 +26,7 @@
 import java.util.stream.Collector;
 import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
+import org.apache.fineract.infrastructure.configuration.domain.ConfigurationDomainService;
 import org.apache.fineract.infrastructure.core.service.MathUtil;
 import org.apache.fineract.infrastructure.core.service.ThreadLocalContextUtil;
 import org.apache.fineract.portfolio.delinquency.data.DelinquencyBucketData;
@@ -70,6 +71,7 @@
     private final LoanInstallmentDelinquencyTagRepository repositoryLoanInstallmentDelinquencyTag;
     private final LoanDelinquencyActionRepository loanDelinquencyActionRepository;
     private final DelinquencyEffectivePauseHelper delinquencyEffectivePauseHelper;
+    private final ConfigurationDomainService configurationDomainService;
 
     @Override
     public Collection<DelinquencyRangeData> retrieveAllDelinquencyRanges() {
@@ -128,9 +130,11 @@
             List<LoanDelinquencyActionData> effectiveDelinquencyList = delinquencyEffectivePauseHelper
                     .calculateEffectiveDelinquencyList(savedDelinquencyList);
 
+            final String nextPaymentDueDateConfig = configurationDomainService.getNextPaymentDateConfigForLoan();
+
             collectionData = loanDelinquencyDomainService.getOverdueCollectionData(loan, effectiveDelinquencyList);
             collectionData.setAvailableDisbursementAmount(loan.getApprovedPrincipal().subtract(loan.getDisbursedAmount()));
-            collectionData.setNextPaymentDueDate(loan.possibleNextRepaymentDate());
+            collectionData.setNextPaymentDueDate(loan.possibleNextRepaymentDate(nextPaymentDueDateConfig));
 
             final LoanTransaction lastPayment = loan.getLastPaymentTransaction();
             if (lastPayment != null) {
diff --git a/fineract-provider/src/main/java/org/apache/fineract/portfolio/delinquency/starter/DelinquencyConfiguration.java b/fineract-provider/src/main/java/org/apache/fineract/portfolio/delinquency/starter/DelinquencyConfiguration.java
index 734a249..897e62b 100644
--- a/fineract-provider/src/main/java/org/apache/fineract/portfolio/delinquency/starter/DelinquencyConfiguration.java
+++ b/fineract-provider/src/main/java/org/apache/fineract/portfolio/delinquency/starter/DelinquencyConfiguration.java
@@ -18,6 +18,7 @@
  */
 package org.apache.fineract.portfolio.delinquency.starter;
 
+import org.apache.fineract.infrastructure.configuration.domain.ConfigurationDomainService;
 import org.apache.fineract.infrastructure.event.business.service.BusinessEventNotifierService;
 import org.apache.fineract.portfolio.delinquency.domain.DelinquencyBucketMappingsRepository;
 import org.apache.fineract.portfolio.delinquency.domain.DelinquencyBucketRepository;
@@ -57,10 +58,11 @@
             LoanDelinquencyDomainService loanDelinquencyDomainService,
             LoanInstallmentDelinquencyTagRepository repositoryLoanInstallmentDelinquencyTag,
             LoanDelinquencyActionRepository loanDelinquencyActionRepository,
-            DelinquencyEffectivePauseHelper delinquencyEffectivePauseHelper) {
+            DelinquencyEffectivePauseHelper delinquencyEffectivePauseHelper, ConfigurationDomainService configurationDomainService) {
         return new DelinquencyReadPlatformServiceImpl(repositoryRange, repositoryBucket, repositoryLoanDelinquencyTagHistory, mapperRange,
                 mapperBucket, mapperLoanDelinquencyTagHistory, loanRepository, loanDelinquencyDomainService,
-                repositoryLoanInstallmentDelinquencyTag, loanDelinquencyActionRepository, delinquencyEffectivePauseHelper);
+                repositoryLoanInstallmentDelinquencyTag, loanDelinquencyActionRepository, delinquencyEffectivePauseHelper,
+                configurationDomainService);
     }
 
     @Bean
diff --git a/fineract-provider/src/main/resources/db/changelog/tenant/changelog-tenant.xml b/fineract-provider/src/main/resources/db/changelog/tenant/changelog-tenant.xml
index 1c67c77..f8b434e 100644
--- a/fineract-provider/src/main/resources/db/changelog/tenant/changelog-tenant.xml
+++ b/fineract-provider/src/main/resources/db/changelog/tenant/changelog-tenant.xml
@@ -151,4 +151,5 @@
     <include file="parts/0129_transaction_summary_with_asset_owner_report_overpaid_amount.xml" relativeToChangelogFile="true" />
     <include file="parts/0130_add_create_delinquency_action_permission.xml" relativeToChangelogFile="true" />
     <include file="parts/0131_add_configuration_maker_checker.xml" relativeToChangelogFile="true" />
+    <include file="parts/0132_add_configuration_loan_next_repayment_date_calculation.xml" relativeToChangelogFile="true" />
 </databaseChangeLog>
diff --git a/fineract-provider/src/main/resources/db/changelog/tenant/parts/0132_add_configuration_loan_next_repayment_date_calculation.xml b/fineract-provider/src/main/resources/db/changelog/tenant/parts/0132_add_configuration_loan_next_repayment_date_calculation.xml
new file mode 100644
index 0000000..000a1eb
--- /dev/null
+++ b/fineract-provider/src/main/resources/db/changelog/tenant/parts/0132_add_configuration_loan_next_repayment_date_calculation.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements. See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership. The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
+    "License"); you may not use this file except in compliance
+    with the License. You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing,
+    software distributed under the License is distributed on an
+    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+    KIND, either express or implied. See the License for the
+    specific language governing permissions and limitations
+    under the License.
+
+-->
+<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                   xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-4.3.xsd">
+    <changeSet author="fineract" id="1" context="postgresql">
+        <sql>
+            SELECT SETVAL('c_configuration_id_seq', COALESCE(MAX(id), 0)+1, false ) FROM c_configuration;
+        </sql>
+    </changeSet>
+    <changeSet author="fineract" id="2">
+        <insert tableName="c_configuration">
+            <column name="name" value="next-payment-due-date"/>
+            <column name="value"/>
+            <column name="date_value"/>
+            <column name="string_value" value="earliest-unpaid-date"/>
+            <column name="enabled" valueBoolean="true"/>
+            <column name="is_trap_door" valueBoolean="false"/>
+            <column name="description" value="earliest-unpaid-date: default for next-payment-due-date, Use earliest-unpaid-date or next-unpaid-due-date"/>
+        </insert>
+    </changeSet>
+</databaseChangeLog>
diff --git a/integration-tests/src/test/java/org/apache/fineract/integrationtests/LoanDelinquencyDetailsNextPaymentDateConfigurationTest.java b/integration-tests/src/test/java/org/apache/fineract/integrationtests/LoanDelinquencyDetailsNextPaymentDateConfigurationTest.java
new file mode 100644
index 0000000..7dc67f4
--- /dev/null
+++ b/integration-tests/src/test/java/org/apache/fineract/integrationtests/LoanDelinquencyDetailsNextPaymentDateConfigurationTest.java
@@ -0,0 +1,299 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.fineract.integrationtests;
+
+import static java.lang.Boolean.TRUE;
+import static org.apache.fineract.infrastructure.businessdate.domain.BusinessDateType.BUSINESS_DATE;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import java.util.List;
+import org.apache.commons.lang3.tuple.Pair;
+import org.apache.fineract.client.models.BusinessDateRequest;
+import org.apache.fineract.client.models.GetLoanProductsProductIdResponse;
+import org.apache.fineract.client.models.GetLoansLoanIdResponse;
+import org.apache.fineract.client.models.PostLoanProductsRequest;
+import org.apache.fineract.client.models.PostLoanProductsResponse;
+import org.apache.fineract.integrationtests.common.ClientHelper;
+import org.apache.fineract.integrationtests.common.GlobalConfigurationHelper;
+import org.apache.fineract.integrationtests.common.products.DelinquencyBucketsHelper;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class LoanDelinquencyDetailsNextPaymentDateConfigurationTest extends BaseLoanIntegrationTest {
+
+    public static final BigDecimal DOWN_PAYMENT_PERCENTAGE = new BigDecimal(25);
+
+    @Test
+    public void testNextPaymentDateForUnpaidInstallmentsWithNPlusOneTest() {
+        runAt("01 November 2023", () -> {
+            try {
+                // update Global configuration for next payment date
+                GlobalConfigurationHelper.updateLoanNextPaymentDateConfiguration(this.requestSpec, this.responseSpec,
+                        "next-unpaid-due-date");
+                // Create Client
+                Long clientId = clientHelper.createClient(ClientHelper.defaultClientCreationRequest()).getClientId();
+
+                // Create Loan Product
+                Long loanProductId = createLoanProductWith25PctDownPaymentAndDelinquencyBucket(false, true, false, 0);
+
+                // Apply and Approve Loan
+                Long loanId = applyAndApproveLoan(clientId, loanProductId, "01 November 2023", 1000.0, 3, req -> {
+                    req.submittedOnDate("01 November 2023");
+                    req.setLoanTermFrequency(45);
+                    req.setRepaymentEvery(15);
+                    req.setGraceOnArrearsAgeing(0);
+                });
+
+                // Loan amount Disbursement
+                disburseLoan(loanId, BigDecimal.valueOf(1000.00), "01 November 2023");
+
+                // verify repayment schedule
+                verifyRepaymentSchedule(loanId, //
+                        installment(0, null, "01 November 2023"), //
+                        installment(250.0, false, "01 November 2023"), //
+                        installment(250.0, false, "16 November 2023"), //
+                        installment(250.0, false, "01 December 2023"), //
+                        installment(250.0, false, "16 December 2023") //
+                );
+
+                // delinquency next payment date for 01 Nov Business date
+                verifyLoanDelinquencyNextPaymentDate(loanId, "01 November 2023", false);
+
+                // Update business date
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("13 November 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency next payment date for 13 Nov Business date
+                verifyLoanDelinquencyNextPaymentDate(loanId, "16 November 2023", false);
+
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("16 November 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency next payment date for 16 Nov Business date
+                verifyLoanDelinquencyNextPaymentDate(loanId, "01 December 2023", false);
+
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("01 December 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency next payment date for 01 Dec Business date
+                verifyLoanDelinquencyNextPaymentDate(loanId, "16 December 2023", false);
+
+                // add charge with due date after loan maturity date (N + 1)
+                Long loanChargeId = addCharge(loanId, false, 50, "23 December 2023");
+
+                // verify repayment schedule
+                verifyRepaymentSchedule(loanId, //
+                        installment(0, null, "01 November 2023"), //
+                        installment(250.0, false, "01 November 2023"), //
+                        installment(250.0, false, "16 November 2023"), //
+                        installment(250.0, false, "01 December 2023"), //
+                        installment(250.0, false, "16 December 2023"), //
+                        installment(0.0, 0.0, 50.0, 50.0, false, "23 December 2023") //
+                );
+
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("17 December 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency next payment date for 17 Dec Business date N + 1
+                verifyLoanDelinquencyNextPaymentDate(loanId, "23 December 2023", false);
+
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("25 December 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency null next payment date for date after maturity date
+                verifyLoanDelinquencyNextPaymentDate(loanId, "", true);
+
+            } finally {
+                // reset global config
+                GlobalConfigurationHelper.updateLoanNextPaymentDateConfiguration(this.requestSpec, this.responseSpec,
+                        "earliest-unpaid-date");
+            }
+
+        });
+    }
+
+    @Test
+    public void testNextPaymentDateFor2Paid1PartiallyPaidInstallmentsWithNPlusOneTest() {
+        runAt("01 November 2023", () -> {
+            try {
+                // update Global configuration for next payment date
+                GlobalConfigurationHelper.updateLoanNextPaymentDateConfiguration(this.requestSpec, this.responseSpec,
+                        "next-unpaid-due-date");
+                // Create Client
+                Long clientId = clientHelper.createClient(ClientHelper.defaultClientCreationRequest()).getClientId();
+
+                // Create Loan Product with auto downpayment enabled
+                Long loanProductId = createLoanProductWith25PctDownPaymentAndDelinquencyBucket(true, true, false, 0);
+
+                // Apply and Approve Loan
+                Long loanId = applyAndApproveLoan(clientId, loanProductId, "01 November 2023", 1000.0, 3, req -> {
+                    req.submittedOnDate("01 November 2023");
+                    req.setLoanTermFrequency(45);
+                    req.setRepaymentEvery(15);
+                    req.setGraceOnArrearsAgeing(0);
+                });
+
+                // Loan amount Disbursement
+                disburseLoan(loanId, BigDecimal.valueOf(1000.00), "01 November 2023");
+
+                // verify repayment schedule
+                verifyRepaymentSchedule(loanId, //
+                        installment(0, null, "01 November 2023"), //
+                        installment(250.0, true, "01 November 2023"), //
+                        installment(250.0, false, "16 November 2023"), //
+                        installment(250.0, false, "01 December 2023"), //
+                        installment(250.0, false, "16 December 2023") //
+                );
+
+                // delinquency next payment date for 01 Nov Business date with auto paid downpayment installment
+                verifyLoanDelinquencyNextPaymentDate(loanId, "16 November 2023", false);
+
+                // Update business date
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("13 November 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency next payment date for 13 Nov Business date
+                verifyLoanDelinquencyNextPaymentDate(loanId, "16 November 2023", false);
+
+                // pay 16 Nov Installment
+                addRepaymentForLoan(loanId, 250.0, "13 November 2023");
+
+                // verify repayment schedule
+                verifyRepaymentSchedule(loanId, //
+                        installment(0, null, "01 November 2023"), //
+                        installment(250.0, true, "01 November 2023"), //
+                        installment(250.0, true, "16 November 2023"), //
+                        installment(250.0, false, "01 December 2023"), //
+                        installment(250.0, false, "16 December 2023")//
+                );
+
+                // delinquency next payment date for 13 Nov Business date after paying 16 November Installment
+                verifyLoanDelinquencyNextPaymentDate(loanId, "01 December 2023", false);
+
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("16 November 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency next payment date for 16 Nov Business date
+                verifyLoanDelinquencyNextPaymentDate(loanId, "01 December 2023", false);
+
+                // partially pay 01 December installment
+                addRepaymentForLoan(loanId, 100.0, "16 November 2023");
+
+                // verify repayment schedule
+                verifyRepaymentSchedule(loanId, //
+                        installment(0, null, "01 November 2023"), //
+                        installment(250.0, true, "01 November 2023"), //
+                        installment(250.0, true, "16 November 2023"), //
+                        installment(250.0, 0.0, 150.0, false, "01 December 2023"), //
+                        installment(250.0, false, "16 December 2023")//
+                );
+
+                // delinquency next payment date for 16 Nov Business date after partial payment of 01 Dec installment
+                verifyLoanDelinquencyNextPaymentDate(loanId, "01 December 2023", false);
+
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("01 December 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency next payment date for 01 December Business date
+                verifyLoanDelinquencyNextPaymentDate(loanId, "16 December 2023", false);
+
+                // add charge with due date after loan maturity date (N + 1)
+                Long loanChargeId = addCharge(loanId, false, 50, "23 December 2023");
+
+                // verify repayment schedule
+                verifyRepaymentSchedule(loanId, //
+                        installment(0, null, "01 November 2023"), //
+                        installment(250.0, true, "01 November 2023"), //
+                        installment(250.0, true, "16 November 2023"), //
+                        installment(250.0, 0.0, 150.0, false, "01 December 2023"), //
+                        installment(250.0, false, "16 December 2023"), //
+                        installment(0.0, 0.0, 50.0, 50.0, false, "23 December 2023") //
+                );
+
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("17 December 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency next payment date for 17 Dec Business date N + 1
+                verifyLoanDelinquencyNextPaymentDate(loanId, "23 December 2023", false);
+
+                businessDateHelper.updateBusinessDate(new BusinessDateRequest().type(BUSINESS_DATE.getName()).date("25 December 2023")
+                        .dateFormat(DATETIME_PATTERN).locale("en"));
+
+                // delinquency null next payment date for date after maturity date
+                verifyLoanDelinquencyNextPaymentDate(loanId, "", true);
+
+            } finally {
+                // reset global config
+                GlobalConfigurationHelper.updateLoanNextPaymentDateConfiguration(this.requestSpec, this.responseSpec,
+                        "earliest-unpaid-date");
+            }
+
+        });
+    }
+
+    private void verifyLoanDelinquencyNextPaymentDate(Long loanId, String nextPaymentDate, boolean verifyNull) {
+        GetLoansLoanIdResponse loan = loanTransactionHelper.getLoan(requestSpec, responseSpec, loanId.intValue());
+        Assertions.assertNotNull(loan.getDelinquent());
+        if (!verifyNull) {
+            Assertions.assertNotNull(loan.getDelinquent().getNextPaymentDueDate());
+            assertThat(loan.getDelinquent().getNextPaymentDueDate().isEqual(LocalDate.parse(nextPaymentDate, dateTimeFormatter)));
+        } else {
+            Assertions.assertNull(loan.getDelinquent().getNextPaymentDueDate());
+        }
+
+    }
+
+    private Long createLoanProductWith25PctDownPaymentAndDelinquencyBucket(boolean autoDownPaymentEnabled, boolean multiDisburseEnabled,
+            boolean installmentLevelDelinquencyEnabled, Integer graceOnArrearsAging) {
+        // Create DelinquencyBuckets
+        Integer delinquencyBucketId = DelinquencyBucketsHelper.createDelinquencyBucket(requestSpec, responseSpec, List.of(//
+                Pair.of(1, 3), //
+                Pair.of(4, 10), //
+                Pair.of(11, 60), //
+                Pair.of(61, null)//
+        ));
+        PostLoanProductsRequest product = createOnePeriod30DaysLongNoInterestPeriodicAccrualProduct();
+        product.setDelinquencyBucketId(delinquencyBucketId.longValue());
+        product.setMultiDisburseLoan(multiDisburseEnabled);
+        product.setEnableDownPayment(true);
+        product.setGraceOnArrearsAgeing(graceOnArrearsAging);
+
+        product.setDisbursedAmountPercentageForDownPayment(DOWN_PAYMENT_PERCENTAGE);
+        product.setEnableAutoRepaymentForDownPayment(autoDownPaymentEnabled);
+        product.setEnableInstallmentLevelDelinquency(installmentLevelDelinquencyEnabled);
+
+        PostLoanProductsResponse loanProductResponse = loanProductHelper.createLoanProduct(product);
+        GetLoanProductsProductIdResponse getLoanProductsProductIdResponse = loanProductHelper
+                .retrieveLoanProductById(loanProductResponse.getResourceId());
+
+        Long loanProductId = loanProductResponse.getResourceId();
+
+        assertEquals(TRUE, getLoanProductsProductIdResponse.getEnableDownPayment());
+        assertNotNull(getLoanProductsProductIdResponse.getDisbursedAmountPercentageForDownPayment());
+        assertEquals(0, getLoanProductsProductIdResponse.getDisbursedAmountPercentageForDownPayment().compareTo(DOWN_PAYMENT_PERCENTAGE));
+        assertEquals(autoDownPaymentEnabled, getLoanProductsProductIdResponse.getEnableAutoRepaymentForDownPayment());
+        assertEquals(multiDisburseEnabled, getLoanProductsProductIdResponse.getMultiDisburseLoan());
+        return loanProductId;
+
+    }
+}
diff --git a/integration-tests/src/test/java/org/apache/fineract/integrationtests/common/GlobalConfigurationHelper.java b/integration-tests/src/test/java/org/apache/fineract/integrationtests/common/GlobalConfigurationHelper.java
index a44b571..e098a75 100644
--- a/integration-tests/src/test/java/org/apache/fineract/integrationtests/common/GlobalConfigurationHelper.java
+++ b/integration-tests/src/test/java/org/apache/fineract/integrationtests/common/GlobalConfigurationHelper.java
@@ -119,8 +119,8 @@
         ArrayList<HashMap> expectedGlobalConfigurations = getAllDefaultGlobalConfigurations();
         ArrayList<HashMap> actualGlobalConfigurations = getAllGlobalConfigurations(requestSpec, responseSpec);
 
-        Assertions.assertEquals(53, expectedGlobalConfigurations.size());
-        Assertions.assertEquals(53, actualGlobalConfigurations.size());
+        Assertions.assertEquals(54, expectedGlobalConfigurations.size());
+        Assertions.assertEquals(54, actualGlobalConfigurations.size());
 
         for (int i = 0; i < expectedGlobalConfigurations.size(); i++) {
 
@@ -581,6 +581,15 @@
         enableSameMakerChecker.put("trapDoor", false);
         defaults.add(enableSameMakerChecker);
 
+        HashMap<String, Object> nextPaymentDateConfigForLoan = new HashMap<>();
+        nextPaymentDateConfigForLoan.put("id", 59);
+        nextPaymentDateConfigForLoan.put("name", "next-payment-due-date");
+        nextPaymentDateConfigForLoan.put("value", 0);
+        nextPaymentDateConfigForLoan.put("enabled", true);
+        nextPaymentDateConfigForLoan.put("trapDoor", false);
+        nextPaymentDateConfigForLoan.put("string_value", "earliest-unpaid-date");
+        defaults.add(nextPaymentDateConfigForLoan);
+
         return defaults;
     }
 
@@ -705,4 +714,17 @@
 
     }
 
+    public static Integer updateLoanNextPaymentDateConfiguration(final RequestSpecification requestSpec,
+            final ResponseSpecification responseSpec, final String stringValue) {
+        long configId = 59;
+        final HashMap<String, String> map = new HashMap<>();
+        map.put("stringValue", stringValue);
+        log.info("map :  {}", map);
+        final String configValue = GSON.toJson(map);
+        final String GLOBAL_CONFIG_UPDATE_URL = "/fineract-provider/api/v1/configurations/" + configId + "?" + Utils.TENANT_IDENTIFIER;
+        log.info("---------------------------------UPDATE VALUE FOR GLOBAL CONFIG---------------------------------------------");
+        return Utils.performServerPut(requestSpec, responseSpec, GLOBAL_CONFIG_UPDATE_URL, configValue, "resourceId");
+
+    }
+
 }