I read the Trust multiple times and realize there might be a problem since the as you suggested the trust was split into two Trusts but both were revocable.

At the death of the second spouse a Irrevocable Trust needed to be created.

My client was given the name by her lawyer with no documentation.

This is what is giving the Brokerage Firm problems.

If the first EIN is never used then maybe a new EIN under a new name might be the easiest solution.

Thoughts?