Transfers in an HQ enviroment

Well, everyone is entitled to a vote, but my vote on this one would be No.

The receiving store should only care about what is showing up at their location - it doesn't make any difference what the sending store says that they sent. What if an item 'falls off the truck' in transit between stores? the issuing store should count what's leaving their store and the receiving store should count what arrives at theirs - checks & balances...

Ditto!

Screw e-mail, get the messaging system working between stores. The database is there, just not implemented in HQ between stores. Retail Realm has an add-on.

There's a report at the HQ level that shows variance between issued and received. That's where it's detected and that's where any investigation or reconcilliation needs to start.