Thumbscan

A thumbscan is a biometric identification consisting of an image of an individual's thumb print. The process of obtaining this image is also called a thumbscan. It is often used to record one's participation in a contract, presence at an event, or acceptance of an agreement.

In early 2370, a Cardassian Gul put his thumbscan on a Kressari PADD after delivering several weapons to them. 

Kira Nerys later displayed the PADD with the thumbscan before the Chamber of Ministers. 

Later that year, Quark tried to get Inglatu's thumbscan, thus making the contract between the Ferengi and the Dosi official. 

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