The phrase "fake cheque" refers to a check that appears to be genuine but is not legally valid or backed by sufficient funds. It may be counterfeit or created fraudulently to deceive people into believing they have received payment. Full definition
If you never specify where you are taking power from, its like your dragon is without ahead, you have nothing that determine where you are going, and where you are taking things from — like a fake cheque, without a bank name, an account number, and a signature. (tinyatdragon.com)
Upon discovering these frauds, banks generally reverse the credit that was given on the deposit of the fake cheque. (slaw.ca)
Because the lawyer already disbursed funds in reliance on the fake cheque, this reversal removes trust funds belonging to other clients and / or leaves the lawyer's trust account with a negative balance. (slaw.ca)