I know each corporation and perhaps each individual casino might have it's own policies on a line of credit repayment. Here is how it works at MSS. I took out a marker on 10/12 and didn't repay it. About 10 days later I received a notice for payment in the mail with a postage paid envelope. I sent in a check and that cleared today on 11/7. A nice float time even though MM rates suck. I know some here have said that if you don't repay it after X # of days, they just forward the marker (check) to the bank for payment.