Oh boy, not one single thing is BAD advice. You assume the people posting LC's here have the knowledge you do when it's likely they don't.
Every check you can do is valuable to the consumer; it teaches due diligence. Get off your soap box, you didn't help anyone with that post.
Typically if there's a legitimate receipt you're safe...not always but 99% of the time. If it's a local store take the kicks with you along with the receipt and have them verify.
Otherwise, the best thing to do is get the style number from the inside tag and verify it. The same number is on...