Not only did I pay cash for my laser printer, I purchased it from a company that was going out of business years ago. Almost like a yard sale type of thing. But I thought that the laser printer only printed the serial number if it was a color laser. I think I read that it embedded yellow dots.. Maybe i'm wrong. Nonetheless, I agree with you. I wonder if gluing it on would look good... I will be experimenting in the morning before I send anything out.