The Bárcenas Affair is a corruption scandal in Spain that affects the ruling People’s Party (PP). Following revelations about the Swiss bank accounts of party treasurer and senator, Luis Bárcenas, extracts of handwritten accounts, the so-called “Bárcenas papers” (los papeles de Bárcenas) were published. Those allegedly indicate that the PP kept, for many years, a parallel bookkeeping system to record undeclared and illegal cash donations, and used them to pay bonuses to senior members of the party as well as for daily party expenses.