Need a ticket drop off/hold location.

[Rat-a-too-ee]

Can anyone help me... I will be buying Universal Studios tickets from a private party who will be in southern California up until the day before I arrive. Our times to meet do not sync up.

Where can I have them drop off tickets for me to pick up later? Does Mail Boxes Etc do this, or is it something a hotel will do before I check-in and hold an envelope for me?

Any suggestions?