No, C&Bs can be shipped from a UPS store. Used to do it all the time until I ended up having to retrain new clerks & pay their high prices. If you have a UPS return postage paid label; they shouldn't have asked what was in the box anyhow. Just accepted it and went on.
I use Priority or Flat rate USPS now. Much simpler.
Fingers (Show Me MO smoke) McGee - AKA Man of Many Colts - Alter ego of Diabolical Ken; SASS Regulator 28564-L-TG; Rangemaster and stage writer extraordinaire; Frontiersman, Pistoleer, NRA Endowment Life, NMLRA, SAF, CCRKBA, STORM 327, SV115; Charter member, Central Ozarks Western Shooters
Cynic: A blackguard whose faulty vision see things as they are, not as they should be. Ambrose Bierce