You present your driver's license that shows on its face your date of birth, and the cashier computes whether you qualify.
He pays, courteous as ever to the cashier, and when I thank him for lunch, he thanks me.
"Only on Tuesdays," the cashier replies with a sympathetic nod.
"person in charge of money," 1590s, from Middle French caissier "treasurer," from caisse "money box" (see cash (n.)). The immediate source of the English word might be Middle Dutch kassier.
"dismiss," 1590s, from Middle Dutch casseren, kaseeren "to cast off, discharge," from French casser "to discharge, annul," from Late Latin cassare "annul," from Latin cassus "void, empty" (see caste (n.)). Related: Cashiered; cashiering.