A. 1. Check App Settings: Go to the payment settings in the app to see if there is an option to add multiple credit cards. Some apps have specific requirements for linking multiple cards. 2. Update App: Ensure you are using the latest version of Grifin, as updates may include new features like linking multiple cards.

B. 3. Use a Different Payment Method: If linking multiple credit cards is not possible, consider using a single card for transactions or explore other payment methods available in the app.