With the way Target chooses to align themselves, a year ago I couldn't blame any GSTL/ETL-GE for taking the path of least resistance and just not worrying about return fraud. If the company that pays you isn't worried about it, I can't see why you would.
On a personal level, since back when I started as a GSA I would always make every attempt to deny transactions that I thought weren't in the company's best interests. As someone that's been with the company 5yrs, at this point as GSTL I literally walk up to individuals I know to be doing no good, even if I've never seen them in my life, and tell them before I say anything else,"Take your stuff, get out of my store, and don't come back or you're leaving in handcuffs."
8/10 times they start cussing me out, and then My GSA and I will walk them out. (Assuming no AP).
That's not guest experience, that's the fraud experience.
When it comes to our every day guests, I follow the policies and follow the prompts. If the POS allows it without any overrides you're all set. I will use common sense to deny any outlandish returns nicely and professionally for certain no receipt return cases. (No packaging, receipt, we can't find the DPCI, not in file, etc. )