The clear answer to that would be only you can revoke the certificate either by signing or by going to something like the post office/DMV with 1-2 additional pi

The clear answer to that would be only you can revoke the certificate either by signing or by going to something like the post office/DMV with 1-2 additional pieces of ID (for cases where your card is lost/stolen). Also the cert is only for SSN like things and proving your identity in those cases not that you're not a citizen if your cert is out of date. So you couldn't say open a new bank account or apply for a new loan but everything else just keeps working.