Abstract: The present invention is a method of mass production of signs that begins with random generation of three linked unique identification codes. A generic sign template with preselected areas for inserting the three linked unique identification codes is generated. A computer ghostscript is used to inline the three linked unique identification codes to represent them as simple shapes thereby reducing the file size of the three linked unique identification codes such that the three linked unique identification codes are now adapted to be printed as mass producible images. A PDF file of the sign graphics is created to then print on the sign and a unique validation code is covered such that it is only readable by a purchaser of the sign. The present invention is also a method of advertising a good for sale where there is a physical sign having printed thereon a website address, a unique indicia, a unique web identification code and a unique validation code readable only by a sign purchaser.