PDF stamper – 'Adding Extra Protection to your Source PDF files' – more info! by Tips and Tricks HQ Support Portal › Forums › WP eStore Forum › PDF stamper – 'Adding Extra Protection to your Source PDF files' – more info! Tagged: pdf protection This topic has 9 replies, 4 voices, and was last updated 7 years, 6 months ago by admin. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In