Oh Grandmother, what a rubbery face you have!

SANTIAGO (Reuters) - A Chilean man tried to steal $80,000 from his 82-year-old grandmother by disguising his 21-year-old girlfriend as the elderly woman and having her withdraw money from the bank, but the plot was foiled.

The man falsified his grandmother's identity card and his girlfriend wore a latex mask. They might have gotten away with it if it weren't for a bank worker who called the grandmother's home and learned she was visiting relatives in Venezuela.

"She acted like an elderly woman, was dressed as elderly woman and moved like one. It was a good impersonation," Victor Mellado, head of client service at the Banco de Chile in the port city of Talcahuano in southern Chile told local television.

The pair have been arrested by the police for attempted fraud and falsification of documents and face a maximum of up to three years in jail if convicted, prosecutor Jose Orella said.

(Reporting by Monica Vargas; Editing by Cynthia Osterman)