“Signature Failure” errors may occur when generating a transaction,
normally, you can just wait a little while and try to send a payment again. Your payment should be processed with no problems.

If the error message persists no matter how long you wait, check what version of the Zaif mobile app you are using
and update to the newest version if you are using anything less than version 1.0.4.4.

and update to the newest version if you are using anything less than version 1.0.4.4.
※ You can check what version of the Zaif mobile app you have by going to “Menu > Settings” and tapping “About this App.”