USPS Label Broker, the QR route
Per usps.com, checked 2026-07-27, you bring a Label Broker QR code and your sealed package to a participating Post Office, and the retail associate scans the code and prints the label at no charge. Self-service kiosks take the same QR or an 8 to 10 character Label Broker ID typed in. Our USPS Label Broker guide walks the whole flow, including finding a participating location. Since 2026-09-05 a domestic USPS label bought through SMKlog carries this QR code on its own label page, next to the PDF, so the trip needs no printer at all — use either the code or a printed copy, not both.