Avery White Shipping Labels with Paper Receipts work with popular internet shipping software and services such as USPS Click-N-Ship and Shipping Assistant, Stamps Online Postage, UPS and Fedex. Efficient design combines the shipping label and paper receipt onto one sheet, so you"ll never have to waste another label to print the receipt. Labels feature powerful TrueBlock Technology, guaranteed to completely cover up everything underneath so you can reuse boxes, large envelopes and mailing tubes. Shipping made fast and easy.