Can I change my class of mailing service, even if I'm willing to pay more money?

ShipitAPO provides the ability for our members to change the class of mailing service from Priority Mail to Parcel Select to Express Mail (where allowable) and vice versa and allows you to selectively choose the class of mail service on specific packages as desired. However, due to the variability in the Military Mail system, we do not recommend the selection of Express Mail since the U.S. Postal Service typically cannot deliver Express Mail as they promise. Priority Mail offers the best value.