Sainsbury's is making a change to its Nectar Card scheme next month, and it means you'll need different details to access your account.
The supermarket giant, which offers the loyalty scheme to all customers, said it's hoping the changes will make accounts more "safe and secure".
From September, if you use your card online, you will no longer need your account number to access your points online or via the app.
Instead, Sainsbury's said your email address will be used as your main log-in username to make life simpler for customers.
You’ll also be able to use the same log-in for both your Nectar account and Sainsbury’s online grocery shopping.
A spokesman for Nectar said: "We know Nectar card numbers are impossible to remember.
"So soon, you won't have to dig out your card every time you need to log in.
"In the coming weeks we'll start moving Nectar members to our new My ID login service.
"These changes will be staggered so don't worry if you don’t see this new login for a while.
"When the change is complete, you'll be able to log in to our website and app using your email instead of card number.
"You will also be able to login using the same My ID details on both Nectar and Sainsbury's Groceries, so you don't have to remember more than one password.
"In future we will roll out more changes to making managing accounts easier, including only needing to update account details in one place."
They added: "Don't worry nothing else about your account changes.
"Your communication preferences stay the same for each account, and your data remains safe and secure.
"There are no changes in how you use Nectar with our other partners.
"If you would rather not have a shared login with our My ID service (for example if you set up an account for a relative) then please make sure you update one of your accounts to use a different email address by August 31."
