signer

noun4

1. •
   One who signs (in any sense of that verb).
2. •
   One who signs their name (applies their signature to something).

   • John Hancock is a famous signer of the Declaration of Independence.
3. •
   One who uses sign language.

   • Among the hundreds of signers at the conference, most were native signers.
4. •
   One who signs up another.

   • The most prolific signers were to be amply rewarded by the sales-bonus structure.