Signature – la firma
(Pronounced fear-mah)
To remember that signature is pronounced fear-mah (firma) in Spanish, use the following mnemonic:
Her signature was not clear – she needed a firmer (firma) grip on the pen to make it visible.

Firma is feminine, so it’s la firma. Imagine someone with a signature that looks just like a lady:
Examples of firma (signature) in a sentence
Por favor, ponga su firma aquí para completar el contrato.
(Please put your signature here to complete the contract.)
Necesito tu firma en este documento antes del viernes.
(I need your signature on this document before Friday.)
La firma del artista hace que el cuadro sea más valioso.
(The artist's signature makes the painting more valuable.)