thumbprint

For instance, a valid ID and a captured thumbprint are required to carry out a transaction on an ecoATM.

Kindly include your full name, as well as your daughter's, and place your thumbprint on the opposite side of the disk.

He ran a red-tinted, celluloid rectangle through a stamping machine and Hunter pressed his thumbprint upon the signature square.

I never could read His handwriting except His criminal thumbprint on the haddock.

The thumbprint which we puzzled our heads over was a toe-print!

Let her have it; be sure to get her thumbprint, though, and send it up here for comparison.