Please always read a post carefully before clicking on it and check the link before you enter your details. An official Asda competition or giveaway should link to an Asda website such as asda.com. Spelling mistakes or grammatical errors are also clues that a post could be a fake.
Here’s one recent example which has been shared on WhatsApp:
This message uses a subtly different website name – note the special character instead of a D in the image above. Clicking on the link will take you to a fake website that attempts to get your personal information, including financial details.