If you can't see your PayPal API Signature, these are the steps you'll perform to be able to see it again.
- Log in to your PayPal
- Select Profile > Profile and settings.
- Click My selling tools.
- Click Update next to API access.
- Select View API Signature or View API Certificate.
- Select the appropriate Remove option.
- Click Remove Certificate.
- Confirm that you wish to remove the existing API credentials.
Keep in mind if you have using the API certificate with an existing e-commerce store, you will need to regenerate the API certificate after providing us with the API signature again.