I don't have to deal with AfBAs but I would think a central location would be the right process. Telephone apps, I'll give an opinion and maybe someone else that deals with AfBA will give theirs. I would give a verbal disclosure and then follow up by sending a written disclosure. I would document on the acknowledgment line the disclosure was given by phone on X and paper copy was mailed on X.
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The opinions expressed are mine and they are not to be taken as legal advice.