diff --git a/app/api/services/loan_status.py b/app/api/services/loan_status.py
index 6a2c01a..55de9b8 100644
--- a/app/api/services/loan_status.py
+++ b/app/api/services/loan_status.py
@@ -32,17 +32,24 @@ class LoanStatusService(BaseService):
                 customer_id =  validated_data.get('customerId')
                 customer = Customer.get_customer(customer_id)
                 transactionId = validated_data.get('transactionId')
+                account_id = validated_data.get('accountId')
 
-                # Get loans
-                loans = [loan.to_dict() for loan in customer.loans if loan.status == LoanStatus.ACTIVE]
+                if(LoanStatusService.validate_account_ownership(account_id = account_id, customer_id = customer_id)):
 
-                transaction = LoanStatusService.log_transaction(validated_data = validated_data)
+                    # Get loans
+                    loans = [loan.to_dict() for loan in customer.loans if loan.status == LoanStatus.ACTIVE]
 
-                if not transaction:
-                    logger.error(f"Failed to log transaction")
+                    transaction = LoanStatusService.log_transaction(validated_data = validated_data)
+
+                    if not transaction:
+                        logger.error(f"Failed to log transaction")
+                        return jsonify({
+                            "message": "Failed to log transaction."
+                        }), 400
+                else: 
                     return jsonify({
-                        "message": "Failed to log transaction."
-                    }), 400
+                            "message": "Invalid Customer or Account"
+                        }), 400
         
 
                 # loans = [
diff --git a/app/api/services/repayment.py b/app/api/services/repayment.py
index 4d400db..dac4fb0 100644
--- a/app/api/services/repayment.py
+++ b/app/api/services/repayment.py
@@ -2,6 +2,7 @@ from flask import request, jsonify
 from marshmallow import ValidationError
 from app.api.enums.loan_status import LoanStatus
 from app.models import Repayment
+from app.models.customer import Customer
 from app.models.loan import Loan
 from app.utils.logger import logger
 from app.api.schemas.repayment import RepaymentSchema
@@ -31,34 +32,41 @@ class RepaymentService(BaseService):
                 request_id =  validated_data.get('requestId')
                 loan_id = validated_data.get('debtId')
                 product_id = validated_data.get('productId')
-
-    
+                account_id = validated_data.get('accountId')
+                customer = Customer.get_customer(customer_id) 
         
-            # Save the repayment details  
-                repayment = Repayment.create_repayment(
-                    customer_id = customer_id,
-                    loan_id = loan_id,
-                    product_id = product_id
+                if(RepaymentService.validate_account_ownership(account_id = account_id, customer_id = customer_id)):
 
-                )
+                    # Save the repayment details  
+                    repayment = Repayment.create_repayment(
+                        customer_id = customer_id,
+                        loan_id = loan_id,
+                        product_id = product_id
 
-                if not repayment:
-                    logger.error(f"Failed to save repayment details")
-                    return jsonify({
-                        "message": "Failed to save repayment details."
-                    }), 400
-            
+                    )
+
+                    if not repayment:
+                        logger.error(f"Failed to save repayment details")
+                        return jsonify({
+                            "message": "Failed to save repayment details."
+                        }), 400
                 
-                #Update Loan status
-                Loan.update_status(loan_id = loan_id, status = LoanStatus.REPAID)
-                
-                transaction = RepaymentService.log_transaction(validated_data = validated_data)
+                    
+                    #Update Loan status
+                    Loan.update_status(loan_id = loan_id, status = LoanStatus.REPAID)
+                    
+                    transaction = RepaymentService.log_transaction(validated_data = validated_data)
 
-                if not transaction:
-                    logger.error(f"Failed to log transaction")
+                    if not transaction:
+                        logger.error(f"Failed to log transaction")
+                        return jsonify({
+                            "message": "Failed to log transaction."
+                        }), 400   
+                else: 
                     return jsonify({
-                        "message": "Failed to log transaction."
-                    }), 400
+                            "message": "Invalid Customer or Account"
+                        }), 400
+        
 
 
                 # Simulated processing logic
diff --git a/app/swagger/schemas/LoanStatusRequest.json b/app/swagger/schemas/LoanStatusRequest.json
index 0252f26..43adf6b 100644
--- a/app/swagger/schemas/LoanStatusRequest.json
+++ b/app/swagger/schemas/LoanStatusRequest.json
@@ -16,6 +16,10 @@
         "channel": {
             "type": "string",
             "example": "USSD"
+        },
+        "accountId": {
+            "type": "string",
+            "example": "ACN8263457"
         }
     },
     "xml": {
diff --git a/app/swagger/schemas/RepaymentRequest.json b/app/swagger/schemas/RepaymentRequest.json
index c31d585..9543f74 100644
--- a/app/swagger/schemas/RepaymentRequest.json
+++ b/app/swagger/schemas/RepaymentRequest.json
@@ -24,6 +24,10 @@
         "channel": {
             "type": "string",
             "example": "USSD"
+        },
+        "accountId": {
+            "type": "string",
+            "example": "ACN8263457"
         }
     },
     "xml": {