How to actually print fedex / usps labels with a thermal printer? Fedex doesn't give these options, Adobe PDF viewer prints labels correctly to the printer, Fedex software seems to treat the printer as an 8.5x11 printer, and prints part of the label. ... In the end, I bought a Rollo thermal printer and signed up for a GoShippo shipping account. Now it prints beautifully for USPS, UPS, FedEx, etc.