Careful what printer you use to print it out, some of them add patterns of dots that can uniquely identify the print: https://en.wikipedia.org/wiki/Machine_Iden

Careful what printer you use to print it out, some of them add patterns of dots that can uniquely identify the print: https://en.wikipedia.org/wiki/Machine_Identification_Code https://en.wikipedia.org/wiki/Machine_Identification_Code