Because these protection papers were used to define freemen and citizenship, many black sailors and other men also used them to show that they were freemen if they were stopped by officials or slave catchers. They also called them "free papers" because they certified their non-slave status. Many of the freed blacks used descriptions of tattoos for identification purposes on their freedom papers.
Mainstream art galleries hold exhibitions of both conventional and custom tattoo designs, such as Beyond Skin, at the Museum of Croydon. Copyrighted tattoo designs that are mass-produced and sent to tattoo artists are known as "flash", a notable instance of industrial design. Flash sheets are prominently displayed in many tattoo parlors for the purpose of providing both inspiration and ready-made tattoo images to customers.