AIM Mail Center at 1256 West Lathrop Road, Manteca, California.

Came here because the nice lady at the French Camp post office recommended it to get something notarized. When I arrived there were to customers ahead of me and the worker (by himself during the holidays). He said it was going to be a 30-45 minute wait(to get something notarized!) because "all of the customers(two!) and all the packages I need to prepare". He wasn't terribly friendly about it either. Here's an idea, take a break from that for 30 seconds and notarize the document, or even better, have more than one employee working at a place that specializes in shipping during the holidays. Anyways, I just took my business to the UPS store and had it taken care of immediately and friendly.