If you are only covering 15 minute breaks and lunchs you will be fine. Make sure people have their PO#'s and things match up. No PO# or something doesn't feel right, they wait till the receiver gets back from their 15 minute break or lunch be firm. A vendor needs you to give him a PO# for his huge order and you don't feel comfortable he waits for the receiver or you call LOD.
However..... If you are going to be covering a two week vacation or something there is a lot of paper work, record keeping, stupid daily signatures, etc etc etc that needs to be done. At my store my receiver has the power to tell vendor's "NO". Your area isn't cleaned up, no PO for you. A merchandiser never worked out your order from last Friday and you are trying to bring in 3 more pallets today, your shipment is refused, oh you have a PO that you found a random softlines ETL to sign, I don't f'ing care, denied. LOL receiver takes some thick skin. Vendors get paid as soon as Target accepts the merchandise. I had a Pepsi vendor notorious for over ordering right before he would go on vacation then his fill in salesman would have to deal with having way to much product for the two weeks the regular vendor was gone. Got to the point where if I didn't sign his paper the receiver denied everyone of his shipments. Pepsi corporate got involved long store short he works for coke now as a stocker.