There are several offers that require you to print coupons or pdf's to receive credit. You do not actually have to print, you just need the offer to think you did.
Save a tree! Dont actually print things you dont need!
Please read the following article to add a fake printer to your computer.
To get to Printers panel on Windows 8, search for Printers > Devices and Printers > add a printer and follow the instructions in the article
To get to Printers panel on Windows 10, select the Start button, then select Settings > Devices > Add a printer or scanner and follow the instructions in the article
For iOS you can try: