Post dating checks in massachusetts
A negotiable instrument can be made payable “on demand” or “at a definite time.” (UCC § 3-104.) A post-dated check is an order to pay the bearer at a definite time in the future.
Although it is legal to post-date a check, the bank to which the check is presented for payment may charge the payor’s account even before the date of the check and even if doing so creates an overdraft.
Although the UCC is not itself a law, it has been enacted in all 50 states (with limited modifications in certain states).
Under the UCC, a check is an order by the “payor” (you, the small business owner) to pay a fixed amount of money to the bearer (or payee -- the tech support contractor).
Recently, at the request of my tech support contractor, I renewed my service contract with him. You did not commit a crime and you probably did not violate the law.
I asked that he not cash the check for a week because I would not have enough funds in the account until that time. He said okay and dashed off to his next appointment. Check fraud laws vary somewhat from state-to-state.