What should I do if I accidentally wrote some draft employment letters for American relatives?

It's no problem to write a draft appointment letter.

No criminal proof is very important. Pay attention to whether the certificate expires at the time of visa (the validity period is only 1 year). If it is overdue, you should apply for another one. The tax bill is more important, and the protection is not enough. In a word, everything in the appointment book is ready, and the guarantee is enough, which is foolproof.