A marker is a form of credit a licensed casino extends to a patron, typically documented as a signed instrument functioning much like a check, allowing the patron to draw gaming chips against a credit line rather than cash. When a patron fails to repay a marker, the casino can pursue collection, and in some jurisdictions an unpaid marker can also expose the patron to criminal bad-check liability, since the instrument is legally structured to function like a negotiable instrument rather than an ordinary informal debt.

Defenses raised in marker-collection disputes commonly include claims that the casino extended credit improperly (to a patron who was intoxicated, underage, or on a self-exclusion list), that the marker was procured through fraud or duress, or that the casino failed to follow required credit-extension procedures under its state gaming license. Because casino credit is a licensed and regulated activity, procedural compliance by the casino itself is frequently as central to the dispute as the patron's ability to pay.

Juricratic models a marker-collection dispute as a debt-collection claim with a distinct, separately-dialed defense track for licensing and credit-extension compliance, because a procedural failure by the casino can undercut collectability even where the underlying debt itself is not seriously disputed.

Casinos and their collections counsel use this framework to evaluate the strength of a marker-collection claim before pursuing civil or, where available, criminal bad-check remedies, and to audit their own credit-extension practices against applicable state gaming regulations to reduce future collectability challenges. Patrons and their counsel use the same framework to evaluate available defenses, particularly around self-exclusion and improper credit extension.