Appendix D to Reg CC contains the endorsement standards required on checks. Also Federal Reserve Board Special Notice. Federal Reserve Bank of New York Circular No. 10246, July 1, 1988. contains more detailed information from the dark past when Reg CC was implemented. Hope this helps.
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David J Mulkerin, CRCM
All opinions expressed are mine and not those of my employer and are not to be taken as legal advice.