diff --git a/app/api/services/loan_status.py b/app/api/services/loan_status.py
index bfe8b68..08d2c2a 100644
--- a/app/api/services/loan_status.py
+++ b/app/api/services/loan_status.py
@@ -1,5 +1,6 @@
 from flask import request, jsonify
 from marshmallow import ValidationError
+from app.models import Customer
 from app.utils.logger import logger
 from app.api.schemas.loan_status import LoanStatusSchema 
 from app.api.services.base_service import BaseService
@@ -25,6 +26,15 @@ class LoanStatusService(BaseService):
             with db.session.begin():
                 validated_data = LoanStatusService.validate_data(data, LoanStatusSchema())
                 customer_id =  validated_data.get('customerId')
+                customer = Customer.get_customer(customer_id)
+                transactionId = validated_data.get('transactionId')
+
+                loans = customer.loans
+
+                db.session.flush()
+                
+                validated_data['refId'] = customer.id
+                validated_data['refModel'] = "customer"
   
                 transaction = LoanStatusService.log_transaction(validated_data = validated_data)
 
@@ -35,23 +45,23 @@ class LoanStatusService(BaseService):
                     }), 400
         
 
-                loans = [
-                    {
-                        "debtId": "123456789",
-                        "loanDate": "2019-10-18 14:26:21.063",
-                        "dueDate": "2019-11-20 14:26:21.063",
-                        "currentLoanAmount": 8500,
-                        "initialLoanAmount": 10000,
-                        "defaultPenaltyFee": 0,
-                        "continuousFee": 0,
-                        "productId": "101"
-                    }
-                ]
+                # loans = [
+                #     {
+                #         "debtId": "123456789",
+                #         "loanDate": "2019-10-18 14:26:21.063",
+                #         "dueDate": "2019-11-20 14:26:21.063",
+                #         "currentLoanAmount": 8500,
+                #         "initialLoanAmount": 10000,
+                #         "defaultPenaltyFee": 0,
+                #         "continuousFee": 0,
+                #         "productId": "101"
+                #     }
+                # ]
 
                 # Simulated processing logic
                 response_data = {
-                    "customerId": "CN621868",
-                    "transactionId": "Tr201712RK9232P115",
+                    "customerId": customer_id,
+                    "transactionId": transactionId,
                     "loans": loans,
                     "totalDebtAmount": 8500,
                     "resultCode": "00",
diff --git a/app/models/customer.py b/app/models/customer.py
index c36a11a..7692f5a 100644
--- a/app/models/customer.py
+++ b/app/models/customer.py
@@ -20,6 +20,13 @@ class Customer(db.Model):
         back_populates="customer",
     )
 
+    loans = relationship(
+        "Loan",
+        primaryjoin="Customer.id == Loan.customer_id",
+        foreign_keys="Loan.customer_id", 
+        back_populates="customer",
+    )
+
     @classmethod
     def is_valid_customer(cls, customer_id):
         customer = cls.query.filter_by(id=customer_id).first()
@@ -47,6 +54,17 @@ class Customer(db.Model):
         except IntegrityError as err:
             raise ValueError(f"Database integrity error: {err}")
         return customer
+    
+    @classmethod
+    def get_customer(cls, customer_id):
+        """
+        Get customer by  ID.
+        """
+        customer = cls.query.filter_by(id=customer_id).first()
+
+        if not customer:
+            raise ValueError(f"Customer does not exist")        
+        return customer
 
     def __repr__(self):
         return f'<Customer {self.id}>'
diff --git a/app/models/loan.py b/app/models/loan.py
index 252fe74..5f8f1fc 100644
--- a/app/models/loan.py
+++ b/app/models/loan.py
@@ -3,6 +3,8 @@ from app.extensions import db
 from app.models.customer import Customer
 from app.models.account import Account
 from sqlalchemy.exc import IntegrityError
+from sqlalchemy.orm import relationship
+from app.models import Customer
 
 
 class Loan(db.Model):
@@ -21,6 +23,12 @@ class Loan(db.Model):
     created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
     updated_at = db.Column(db.DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc))
 
+    customer = relationship(
+        "Customer",
+        primaryjoin="Customer.id == Loan.customer_id",
+        foreign_keys=[customer_id],
+        back_populates="loans",
+    )
 
     @classmethod
     def create_loan(cls, customer_id, account_id, offer_id, principal_amount, status='pending'):