A reasonable interpretation of the silence would be a "No." I'm not certain what the objective of such an agreement would be. A contractual commitment to you would not enhance your customer's responsibility to comply with the law regarding registration, licensure, operating an effective BSA program, etc. It would also not reduce your responsibility for monitoring their activities.
At most, it might imply that they understood their responsibilities, but only as your bank explained them. Personally, I would rather have a record in the file where I mailed them some FinCEN publications where FinCEN explained their responsibilities.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.