The Regulation DD commentary specifically says you are not required to disclose them:
2. Other fees. Institutions need not disclose fees such as the following:
i. Fees for services offered to account and nonaccount holders alike, such as travelers checks and wire transfers (even if different amounts are charged to account and nonaccount holders).
ii. Incidental fees, such as fees associated with state escheat laws, garnishment or attorneys fees, and fees for photocopying.
Regardless, I suggest you disclose them in fairness to the consumer and to support your claim if you happen to have assessed the fee before delivering the funds to the creditor. The fact that you voluntarily disclosed it does not mean you would have to give notice before you changed it. Regardless, I would.
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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.