This happened to me a couple of years ago at a local Ross store. I refused to give my ID, told them I would keep the darn blouse and give it away. Also that I would not be returning to their store which I haven’t. They didn’t care.
There is a certain subset of the population which exploits generous return policies offered by retailers to make money.
Most of our returns were legitimate and smoothly performed. Without a receipt, you got trade credit instead of cash back. But, in those days, store management was relatively experienced and able to sort the legitimate customers from the grifters. These days, the store manager might be some 23 year old kid who passed a drug test and managed to keep the job for a couple years to get promoted.
We had some really weird returns back in the 1980's including obviously used merchandise and people who would steal stuff from one store in our chain to be refunded at another. My favorite manager was a black guy who looked like he could have sung for The Platters or one of those other clean cut singing groups.
One day, this seriously overweight black lady brings some obviously worn beach sandals into the store to demand a refund. Our guys says "Are you sure you bought these new?"
The lady says "yes."
Our guy says "That's not possible because we don't sell them in that condition. No way can I give you a refund or store credit."
Lady gets all huffy and screams "I don't appreciate you calling me a liar!"
Our guy points her to the door and says "And I don't appreciate being lied to."
Everybody who could hear the conversation, customers and employees alike, begin applauding as she slinked out the door.