Precursor security document

A precursor security document including and in order: a) at least one polyester film biaxially transparent stretched, b) at least one forming layer colorless color containing at least one absorber of infrared light, unprecursor colorless dye and a binder polymer, c) a polymeric support, wherein the polymeric binder is a copolymer comprising at least 90% by weight of a chlorinated ethylene yentre 1% by weight and 10% by weight of vinyl acetate with respect, both cases, the total weight delaglutinante.