Barclay Bank is a legitimate company; I have a Barclay Visa card.
If you are not certain about this application, look at the fine print on it and the return address—these should tell you if the application came from Barclay’s or from some scammer. If you suspect identity theft, the sooner you find out, the better.
If you actually want to get one of their cards, they have a legitimate website and phone number that you can find and use to contact them.
The best thing is to shred the application. Sometimes, companies send a card with a number on it, my own personal application card. I cut those up (they will jam my shredder) and then throw the pieces away gradually, never putting them all in the same trash bag. I want to make sure the information on the card cannot be recreated.
We have a Barclay card, but it’s a reward card affiliated with LLBean, and you get reward coupons toward buying LLBean clothes. It was really nice to have when the kids were little and we needed sturdy shoes and clothes for them.
If you really want a credit card, go online to one of those credit card comparison sites and you may get a better offer than this shady one you got in the mail.
Whatever you do, don’t send a utility bill. Don’t apply for that card.