Here are the steps for resetting your PIN:
I KNOW MY OLD PIN
Go to your "Profile" tab on the app
Scroll down and tap 'Settings'
Under the security section, tap 'Change Chipper PIN'
You'll be prompted to enter your old PIN, and then right afterwards enter your new PIN
Your PIN is changed successfully
Please note that your PIN is a very important part of your account. We advise that you do not under any circumstance share you PIN with anyone to prevent unauthorized activity on your Chipper account.