Burger King Taiwan is holding a marketing campaign offering 10,000 free burgers to customers of rivals McDonald’s and KFC.

Consumers are being invited to swap a same-day receipt for a set meal at either franchise to receive a free Burger King burger.

Burger King Taiwan, which has traded for 29 years, has lagged behind rival brands in market-share terms and has attempted a comeback over the past several years by shuttering 20 stores and replacing its management team. The brand was taken over by Asian private equity fund Nexus Point in late 2017.

The brand has since expanded and expanded its reach via local food delivery platforms Foodpanda, Uber Eats, and Deliveroo among others.

The campaign will run through to December 10.