An entity can't sign anything. People sign, either for themselves, on behalf of another individual (as attorney-in-fact, guardian, conservatory, custodian or some other form of authorized or fiduciary signer), or on behalf of an entity (authorized signer). If there is a guardianship involved, the ward should not have signature access at all.
Just what do you mean by "guardianship entity"?
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8