Is there a time limit between printing and actually mailing a package with Custom DC? I have a box of Media Mail to send to my daughter. I boxed it all up and printed the label on Sunday night, intending to mail it early in the week. Unfortunately, some bad tuna I ate on Sunday night has me sticking close to the bathroom; it's unlikely I'll be able to mail it much before next week. Note that this is not a PBS shipment.

Take it to the window and ask them to round date it.  Explain what happened.  Hope you are feeling better!

The PO window will put a zero postage new date sticker on it to show the actual mail date. Just ask them for it.

Custom DC does not have any postage printed on it, just the tracking bar code, so no there isn't technically a time limit though I wouldn't try it 6 months later.

I'd say don't complain when you observe other postal delivery times taking longer then expected as possibly those mailers had bad tuna with a printed start the clock time in the web before they could actually deliver the parcel into the system to track actual delivery performance. I  guess you see things do happen - tuna - Ughhh, so maybe there are reasons to not be so critical of everything.

DC/Tracking only is not dated and is good to mail.  Tracking with printed postage is dated and would need a zero strip (to refresh postage) if not mailed on the label date.