The chicken chain restaurant Nando's set up the task two years ago, promising that those who went to each one of its 1,031 outlets worldwide would receive a "black card", which gives you free Nando's for life.
So far, Christopher has spent around £1,000 on the challenge visiting 85 UK branches all in a year's time and has even gained a stone in the process. However, the filmmaker from St Albans, Hertfordshire, then discovered that the challenge was no longer running.
The chicken enthusiast was quoted in the Daily Mail saying: "I love chicken and eat in there a couple of nights a week anyway, so decided to embrace the challenge. I'd do anything to get my hands on a card giving me free chicken"
"There are more than 300 Nando's in Australia, and I was planning to go there next year, but then I heard that the contest wasn't valid anymore. I was gutted."
Nando's bosses found out about Christopher's effort on the challenge and have agreed to honour their old promotion. If he can prove that he has attended the restaurant's 900 other branches worldwide, he will be rewarded with the original prize of free Nando's for life.
The 26-year-old has been charting the challenge on social media by uploading an image of him in every restaurant striking a "Nando's pose", which involves imitating a cockerel, the symbol of the chicken eatery.
Christopher said that he is still not sick of the food: "I am looking forward to exploring the world whilst eating my favourite meal."
Good luck, Christopher!
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