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Melbourne, Australia’s Cafe 51 plans to give 10 of its most loyal customers free burgers for life.

The thought of an entire lifetime of burgers is enough to get any hardcore hamburger lover’s mouth watering. But the popular burger restaurant’s offer comes with a catch: You have to get a life-sized tattoo of your favorite burger from Cafe 51 — and its “burgerlove” logo — inked somewhere on your body.

“Tattoos are for life, so why shouldn’t burgers be free for life too, right?” Cafe 51 quips on its website.

You need to be at least 18 years old to participate. You must also agree to be photographed and filmed for promotional materials for Cafe 51. If you’re selected, you can score one free burger each day for life from the Melbourne restaurant.

Before you consider inking a big burger on some inconspicuous spot on your body, be warned: you must be willing to display the tattoo “on demand to [Cafe 51] staff” to cash in on your free burger.

The Australian burger joint says it’s been overwhelmed by the response to the promotion since the idea was first presented on Sept. 25. Chris Binos, co-founder of Cafe 51, tells CNBC:

“After launching the promo online on Sunday night, to date we have had over 3,500 entrants. This is way beyond what we expected but testament to our cult following and the bond we have with our customers. We will be selecting the best 10 entrants to get inked.”

Binos says some patrons already display their “pure passion” for Cafe 51 with tattoos of its burgers. That’s what inspired the new burger tattoo promotion.

“This was a fitting tribute to those willing to wear the #burgerlove brand with pride, for life,” Binos tells CNBC.

Would you get a tattoo in exchange for free food? Share your comments below or on our Facebook page.

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