Problems crop up when the person holding the check jumps the gun and takes it to his bank anyway.
Banks aren't obligated to wait until the date on the check to cash it.
There’s nothing wrong with post-dating a check and asking the person you owe money to hold off on cashing it.
People do this all the time, and it's not against the law.
If you’re running a little short of cash before payday, yet you need to pay a bill, you may be tempted to solve the problem by writing your check, but dating it for after the day you get paid – when you know you’ll have money in the bank.