unstamped
/ʌnˈstæmpt/
adjective
- Not marked with an official stamp, especially a postage stamp or a validation stamp.
- The letter was returned because it was unstamped.
- She found an unstamped document in the old filing cabinet.
- The unstamped passport was not accepted at the border.
- Not having a stamp that indicates approval, payment, or official status.
- He tried to use an unstamped ticket on the train.
- The unstamped contract was considered invalid by the court.
- All unstamped packages were held for inspection.
Synonyms