They will send you a letter, requesting that you pay the debt before the casino submits it to the bank.
Often, the casino will make an attempt to collect the debt before getting law enforcement involved. However, when you fail to pay back a marker within the specified amount of time (often 30 days), the casino will come after you. Whether you have run out of cash on hand or chose not to carry cash in the first place, a casino marker can seem like a practical way to gamble. 6.1 Need Legal Advice About Casino Marker Debt? What happens when you owe a casino money?