Maria Branca dos Santos, more commonly referred to as "Dona" Branca[1] (1902–1992), was a Portuguese criminal known chiefly for maintaining a Ponzi scheme in Portugal between 1970 and 1984 that paid a ten percent monthly interest.

[3] Dona Branca was arrested in 1984, and in 1988 she was sentenced to 10 years in prison.

[4] She was one of the last inmates of Convento das Mónicas when it was dismantled in 1989.

In 1993 RTP created a telenovela titled A Banqueira do Povo ("The People's Banker") based on these events with Eunice Muñoz playing the role of the title character, in this case Dona Benta.

This Portugal biographical article is a stub.