One way is to look at the logo. Genuine bags will have the logo in its original form, while fake ones will have a less clear or blurry version. Another way is to check for stitching on the inside of the bag. If there are no stitches on the inside, it is likely that it's not genuine and was made from cheaper materials. Finally, you can also check for tags on your bag - if there are any tags, they're more likely real and not fake.