There are a wealth of Loyalty Cards and bonus schemes available from today's supermarkets. Maybe you belong to one or more of them?
Tesco participate in two Clubcard schemes now. One is FREE, the other has a monthly charge.
Points for pounds are added to your receipt and vouchers arrive in the post once you have accumulated sufficient. It is 1 point for every pound you spend in store and online. On fuel, it's 1 point for every £2 spent. Tesco also have a reward scheme where you can change vouchers for Days Out, meals, weekend breaks and more. The vouchers are redeemed for 3 times their value, so this is a good way to save money. There is also a Clubcard Plus scheme now but this has a monthly charge of £7.99. You qualify for 10% off two big shops per month, so if you have a big family, this could well be for you. I live on my own so cannot comment as it would not work for me. Take a look here for details.
Morrisons participate in the More scheme. You receive 5 points for every pound spent in store, online or at petrol stations. One 5,000 points have accumulated, you have a £5 voucher to spend in store. There are also extra points added to various promotions and these change frequently. See here for details.
Iceland offer a Bonus Card which works differently to other supermarkets. It's a bit like a Savings Scheme that was often used years ago. This is good value as every time you add money to the card, once £20 is reached, Iceland add another £1 so that is in effect 5% interest. You can use the credit on your bonus card against your shop. If you a regular in Iceland, this is a great way to save. See details here.
Sainsbury's offer a Nectar Card. They own Nectar and shopping in Sainsbury's gives you 1 point for every pound spent in their stores. The card can also be used at 400 of Nectar partners too, so this can save quite a lot of money. Take a look at how to apply here.
Co-Op offer a Reward Account card. You can save 5% or £1 on every £20 saved. This is similar to Iceland and details can be found here.
Marks and Spencer issued a Sparks card a few years ago and this rewards the customer with special offers as the number of points build up on their cards. More information can be found here.
Lidl and Aldi don't issue loyalty cards but Lidl offer do offer a Welcome Card each time a new Lidl store is open and you can have a free item every week for 6 weeks every time you spend over £20. Details are here.
Aldi prefer to offer lower prices than all the other supermarkets and don't feel the need to give loyalty cards.
So there we have it. Some people may not like the supermarkets knowing their personal details and prefer to shop without loyalty or discount cards.