Tesco Clubcard holders will able to double their points until the beginning of March - but there's only one way of doing it.
Shoppers will need to download the app to take advantage of the promotion, which is running until March 1.
You can get the extra points by scanning your Clubcard at the checkout via the Clubcard app, Manchester Evening News reports.
According to Martin Lewis' website Money Saving Expert, "Until Sunday 1 March, you can get double points on your shopping if you scan your Clubcard at the checkout via the Clubcard app (available for iPhone and Android)."
You won't be able to double up if you scan your card with Apple Pay, Android Pay or the Pay+ app.
The double points offer is available on most grocery items, but can't be redeemed on a number of other products.
These include fuel, tobacco products, stamps, saving stamps, items from the café, lottery products, prescription medicines, infant formula, gift cards, travel money and e-top-ups.
Tesco recently warned shoppers to spend their Clubcard vouchers before February 29, which is when existing points will expire.
