Why did I get the error "We were unable to decrypt the Certificate ID"?

Spaces or carriage returns were added within the encrypted string of a Website Payments Standard button. If you encrypt buttons through the Encrypted Website Payments (EWP) feature, possible issues may include:

• The auto-formatting issue may affect the buttons.
• The public certificate used in creating the encryption may need uploading.
• The Certificate ID specified may not match the one in the PayPal account.

If you use the PayPal Buttons page to create a button, copy the HTML code from the  Generated Code page and paste it into a Notepad document. Copy this code from Notepad and paste it to your webpage. If possible, turn off the auto-format feature on your web development tool, or remove any formatting for this segment of code.

Learn more about Encrypted Website Payments.

Try it yourself on the PayPal buttons page.