American Express has rolled out a new way for cardholders to collect travel memories: blockchain-backed passport stamps that live on a public ledger. The stamps are meant to be keepsakes, not investments, and they are tied to in-person spending while traveling.

American Express Launches Passport Stamps

According to company information and reports, the feature — called Amex Passport — issues NFT-style stamps as ERC-721 tokens on Base, an Ethereum layer-two network.

Eligible cardholders must be US consumer cardholders with their cards linked to their online Amex account. Stamps are earned when a linked card is used in person in any of 130+ qualifying countries and regions, and past trips can be stamped retroactively for up to two years based on purchase records.

What The Stamps Show

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