Pasted as copied from: https://www.aryk.store/2019/08/google-adsense-unable-to-verify-your-identity.html

Speaking of the sanctions, about 3 or 4 weeks ago, 5 of our followers reported that they received a message with the subject "Google AdSense: Unable to Verify Your Identity" from Google of which the affected AdSense accounts were already verified AdSense account.

This arose concerns and we decided to observe and research what the cause might be and surprisingly, we found out exactly what the causes are and your possible solutions.

Google AdSense: Unable to Verify Your Identity - Possible Causes

Duplicate ID Data File in Record: this is an information we just confirmed yesterday. In case you are not aware of this fact yet, Google now has dedicated experts that perform manual verification on AdSense accounts. Thus, the sites, the ID document used for verification, the content of the sites among other data are mapped, saved and kept in record to the ID of a particular AdSense account, usually the first AdSense account those data are used with. Bottom line: if an ID that was used to verify a particular AdSense account is used to verify another, both AdSense accounts are penalized accordingly. The same applies to other data saved for the same AdSense account ID that's already in Google's record.

Now, if Mr A uses an ID Card that bears exactly Mr A's name and passport photograph to verify an AdSense account, that ID card is now saved as exactly for Mr A. Now, if Mr B or anyone uses Mr A's ID card to verify another AdSense account using the same or different names, both AdSense accounts are penalized.

More interestingly still, supposing Mr A originally used his National ID card to verify an AdSense account then, Mr B or anyone found Mr A's Drivers License and used it to verify another AdSense account. Both accounts would still be penalized. Wonder why? Google understands that people can bear the same name but it is impossible to have the same and the same facial look.

Since Mr A's ID card would retain his name and picture regardless of the ID card he holds, it is now pointless and lead to a dead-end to use any of such person's ID card to verify or link it to or with your AdSense account.

You may check the source link above for full article and the solutions.