stamp (v)

It is necessary to stamp your passport.
Every carton of yogurt is stamped with a sell-by date.
The customs officer carefully stamped each passport with an entry seal.
The judge proceeded to stamp the legal document as evidence in the court case.
Before finalizing the contract, the parties agreed to stamp it with their official seals.
In the notary's office, the clerk used a special ink pad to stamp the official seal.