George L., is your scammer using rhetoric like "EFT Only, Not for Deposit" on the check and saying you have acqiesced to payment under the Uniform Commercial Code or something like that? If so, its a new scam folks are using offering purported checks on closed or insufficient funds accounts for electronic transfer only upon presentation to the Federal Reserve.

Argument is that when Roosevelt took the USA off the gold standard the Federal Reserve became bound to pay all public debt (which is true). Obviously whatever your scammer owes you is not public debt, but he may argue that since you did not timely present or return the check you have tacitly agreed to his terms of payment.

There's a website that in return for a payment to them they'll supply you with all the forms necessary to convert your private debts to public debt and somehow be released from mortage and other financial obligations...Geo