If you get any piece of art you have the possibility to change it, without explanation, for another one worth the same or higher price, within a period of five years. If the new work is more expensive, than the one you bought originally, you only pay the balance. Original value and discounts are always taken into account.

In Galería-Museo Aguilar, each work has a double certificate: The original one and another certified by Galería-Museo Aguilar; both are given to the beneficiary as an evidence of authenticity.