Amazon requesting identity verification for my VA account manager

An account manager has been managing my Amazon account for the past two years, and I’ve been getting excellent results from her work. I really don’t want to discontinue working with her because she has been doing a great job.

However, Amazon recently requested her documents, such as her passport and address, for verification purposes, possibly due to an issue in my Canadian marketplace. I provided all the requested documents to Amazon, and they later asked for an authorization letter as well, which I have also submitted.

But so far, I haven’t received any response from them.

Is anyone else experiencing the same issue? And is there anything else I can do in this situation?