diff --git a/app/api/services/transaction_offers_service.py b/app/api/services/transaction_offers_service.py
index 7cf8b7a..7a2d58d 100644
--- a/app/api/services/transaction_offers_service.py
+++ b/app/api/services/transaction_offers_service.py
@@ -80,7 +80,7 @@ class TransactionOfferService:
                     'max_amount': offer.max_amount,
                     'eligible_amount': offer.eligible_amount,
                     'tenor': offer.tenor,
-                    'created_at': offer.created_at.isoformat(),
+                    'created_at': offer.created_at.isoformat() if offer.created_at else None,
                     'updated_at': offer.updated_at.isoformat() if offer.updated_at else None
                 })
 
@@ -106,4 +106,4 @@ class TransactionOfferService:
             logger.error(f"An error occurred: {str(e)}", exc_info=True)
             return jsonify({
                 "message": "Internal Server Error"
-            }), 500
\ No newline at end of file
+            }), 500
diff --git a/app/models/transaction_offers.py b/app/models/transaction_offers.py
index d2838bc..49c7748 100644
--- a/app/models/transaction_offers.py
+++ b/app/models/transaction_offers.py
@@ -22,14 +22,20 @@ class TransactionOffer(db.Model):
     eligible_amount = db.Column(db.Float, nullable=True)
     tenor = db.Column(db.Integer, nullable=True)  # tenor in months, typically
 
-    created_at = db.Column(db.DateTime(timezone=True), server_default=func.now())
-    updated_at = db.Column(db.DateTime(timezone=True), onupdate=func.now())
-    customer = relationship(
-        "Customer",
-        primaryjoin="Customer.id == TransactionOffer.customer_id",
-        foreign_keys=[customer_id],
-        back_populates="transaction_offers",
-    )
+    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))
+    # created_at = db.Column(db.DateTime(timezone=True), server_default=func.now())
+    # updated_at = db.Column(db.DateTime(timezone=True), onupdate=func.now())
+
+    def __repr__(self):
+        return f'<TransactionOffer {self.id}>'
+
+    # customer = relationship(
+    #     "Customer",
+    #     primaryjoin="Customer.id == TransactionOffer.customer_id",
+    #     foreign_keys=[customer_id],
+    #     back_populates="transaction_offers",
+    # )
 
     @classmethod
     def is_valid_transaction_offer(cls, transaction_offer, customer_id, product_id):
@@ -114,7 +120,4 @@ class TransactionOffer(db.Model):
     #         'tenor': self.tenor,
     #         'createdAt': self.created_at.isoformat() if self.created_at else None,
     #         'updatedAt': self.updated_at.isoformat() if self.updated_at else None,
-    #     }
-
-    def __repr__(self):
-        return f'<TransactionOffer {self.id}>'
\ No newline at end of file
+    #     }
\ No newline at end of file