Scrip

Scrip was a form of currency used by the prehistoric humans who lived on Erde-Tyrene 9,000 years after the human-Forerunner wars. During his visit to Erde-Tyrene in search of the Organon, Bornstellar Makes Eternal Lasting used a stash of scrip located by his ancilla to secure passage on an airship.

Trivia
Scrip is a term for any substitute for legal tender and is often a form of credit.

List of appearances

 * Halo: Cryptum