What shipping providers am I able to use with Zazzle's shipping labels?

Zazzle's shipping systems are integrated with UPS and USPS. To give our customers the best possible rates, we calculate which provider offers the cheapest rates for each order depending on the ship from and ship to addresses. When printing each label, you should be prepared to receive either a UPS or a USPS label to ship the order. If you are unable to ship through either of these providers, please let us know.