McDonald's worker reveals why you should always ask staff for a receipt when ordering

 McDonald's fans will rejoice at the news there's a little trick which could ensure they always get the freshest meals.

Yes, obviously be polite - but also ask (nicely) for a receipt.

Kamran Adan, who claims to have worked in a London branch of McDonald's, says this could very well guarantee your burger hasn't being languishing for ages.

The reason being mystery shoppers - who rate the service and food they're given - ask for receipts for reimbursement purposes.

Meaning, according to Adan's Quora post, employees are eager to make a good impression on them.

 Mystery shoppers now use a promotion called 'Food for Thoughts', rather than the one Adan cites (Gap Busters), and it asks participants to fill out a survey about their experience.

People who use Food for Thoughts are rewarded with with food vouchers for completing the survey.

However, they can't reap the rewards of their hard work without the receipt.

Food for Thoughts is also a nifty way of getting your hands on free grub.

According to MoneySavingExpert, you only need to make the one purchase, which could be something as cheap as an ice-cream cone.

Meaning you'd effectively get a Big Mac and fries for the price of a 69p cone.

A spokesperson for McDonald's told :

“We no longer use a mystery shopper programme, replacing it with our customer feedback survey ‘Food for Thoughts’ in 2016. We place great emphasis on quality control and follow rigorous standards to ensure all of our food is of a high standard for every customer to enjoy.”