Now your passport can help you travel all the way to Burger King for a free sandwich.

Burger King has launched its latest campaign, and it involves using your probably dust-covered passport to earn a free burger from the fast food chain’s “World Gourmet” series.

As part of Burger King's new "World Gourmet" menu in Sweden, the brand is allowing people to bring their passports in for a stamp to get a free burger.

As part of Burger King's new "World Gourmet" menu in Sweden, the brand is allowing people to bring their passports in for a stamp to get a free burger. (Burger King)

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Though there is a catch – the free food offer is only available for those with Swedish passports.

According to the 2019 edition of the Henley Passport Index, Sweden’s passport was one of the strongest in the world, earning visa-free or visa-on-arrival access to 187 countries, compared to 183 for the United States.

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However, since the coronavirus pandemic, the powerful passport has not been able to be used as travel has been halted around the world. Sweden has also been criticized for the country’s lax response to the COVID-19 outbreak.

Putting politics aside, Burger King Sweden is rolling out the red carpet for the wanderlust-hungry Swedes.

Though those considering swapping a page in their passport for a free burger may want to consider that passport books may “become unusable if you choose to stamp it."

Though those considering swapping a page in their passport for a free burger may want to consider that passport books may “become unusable if you choose to stamp it." (Burger King)

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For a limited time, those with Swedish passports are allowed to use their books to get a stamp – with a maximum of up to five stamps – from the restaurant and then trade that in for a burger of their choice from the chain’s new World Gourmet menu, which includes hamburgers inspired by destinations like France and Argentina.

“As the Swedish State Department still recommends citizens not to travel, we’ll let people repurpose their passport to experience tasty foreign flavors for free here in Sweden,” Daniel Schröder, marketing director at Burger King Sweden, said in a press release.

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Though those considering swapping a page in their passport for a free burger may want to consider that passport books may “become unusable if you choose to stamp it” as border protection agencies may not accept the Burger King chain of restaurants as a legitimate country.