We have a SCO TM who's a rockstar at AP recoveries. Most of them, however, are too timid. Remember, this is our merchandise. This is our store. We control what we sell. There are some items we have on the sales floor that we must pull off a transaction when prompted. Just go up and look in the bag. They haven't purchased it yet. If someone gives you problems, just tell them it's your job and you don't appreciate being told how to do your job. If they resist, call AP.
You're also empowered to do receipt checks on things that come out of SCO. If someone walks off, let them walk off, and immediately inform AP so we can get a license plate and start case building.
The majority of theft and fraud at the checklanes takes place at SCO. It should be called Assisted Checkout. No guest should ever feel like they're isolated up there. Our rockstar sco TM catches several ticket switchers, credit card abusers, and skip scanners from sco weekly. The only difference with her is she realizes this is her house, not someone else's. People respect boldness and authority.