
On a first-come, first-served basis

Translation of "on a first-come, first-served basis" into Russian
on a first-come, first-served basis
Tickets will be allocated on a first-come, first-served basis.
Билеты будут распределяться по принципу «первым пришёл, первым обслужен».
Definitions
A method of allocation or service in which people are dealt with or given something in the order that they arrive or request it, with no preference or priority given to anyone.