VV QUESTION!!!!!! PLEASE LOOK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[tarrbear]

The post office won't hold it, because that isn't something they can do. Additionally, I believe the only envelope instructions the post office will listen to are those marking the service type (Media Mail, Priority, Express, etc), so when they see "Hold until..", they'll probably just ignore it.

the hold untill is for the venue, not the post office

But it should be fine, you might want to add Please hold for Taylor Swift until w/e the date is though
instead of just please hold until

[dfreely]

Yes, I know, but the OP asked whether the post office would think they were supposed to hold it, and I was just explaining why they wouldn't.