To that one cashier -
You may have worked at Target longer than me, but I have actually advanced and am therefore slightly more knowledgeable about certain policies than you. Please stop arguing with me in front of guests about our policies. I know what I'm talking about. I trained everyone on the ad match process, it's not my fault you don't listen. Do not get mad at me when I send a guest to the service desk (where you are only covering a 15 minute break - how could it be so messy already!?!?) and then have to come over to correct you because you are telling the guest the opposite of what I'd just told them. If the guest wants to purchase her item at the check lane and then ad match it afterward at the service desk, that is perfectly okay. You scan the receipt, press fix a mistake (K5), wrong price (K4), and then scan the item, enter the new price, K6 for competitor ad match. No biggie. They do NOT have to purchase the item at the service desk if they do not want to. I'm sorry for making you feel like a "giant idiot," but if the guest comes up and says, "Your manager said I could do this," don't tell them I was wrong and they have to return the item just to repurchase it.
Very grr...my trouble cashier since my "parallel promotion" two years ago. Only picks arguments with me. Don't know why, she never wins.