Grant Burton of Melbourne said he wanted to give his parents a trip to Germany for their 40th wedding anniversary so he contacted European rail company Eurail with his tattoo-for-tickets plan, Britain's The Sun reported.
Burton said the company agreed to the exchange if he could attract 5,000 people to a Facebook group outlining the plan. He said the Internet portion was easy, and he now sports the Eurail logo across his back.
"I'm giving something back," Burton said of his gift to his parents. "They've done so much for me. Being a human billboard is a small price to pay."