There is a problem with the certification audit. The general reasons are as follows:

1. If the online banking system prompts "5005 12 signature error, signature verification failed", the certificate status is generally abnormal, including certificate expiration and certificate invalidation. If the certificate status is normal, you need to verify whether the password is entered incorrectly.

2. In the absence of other network anomalies, if this signature fails, the user really signed the reserved name by mistake.

3. Online banking is invalid, just bring your ID card to the bank for renewal.