olemus
Wiktionary:
paid for in advance

näiteid
prepaid expenses -- avansskulud
prepaid interest -- avanssintress
prepaid rent -- ettetasutud rendis

https://en.wikipedia.org/wiki/Prepaid_mobile_phone

https://www.consumerfinance.gov/ask-cfpb/what-is-the-difference-between-a-prepaid-card-a-credit-card-and-a-debit-card-en-433/