Abstract: A substrate with security print and a method to obtain it, which comprises a laminar substrate where color ink prints have been applied on the obverse and reverse of the substrate, whereby these prints coincide and leave an area free of print to form a watermark, and an ultraviolet ink print within said watermark, in a way that the substrate can be verified by holding it against the light to visually verify the watermark and under ultraviolet light to visually detect the ultraviolet ink print that coincides with the watermark.