An API signature is required for ‘PayPal Refunds’ only. Here are the steps you need to follow:
- Log in to your PayPal Business account.
- Click the My Account tab.
- Click the Profile tab. If you haven’t already done so, you need to verify your account before requesting API credentials.
- Click Request API credentials under Account information.
- Click Set up PayPal API credentials and permissions under Option 1.
- Click Request API Credentials.
- Click Request API signature.
- Click Agree and Submit.