Help needed asap- message from Paris buyer

[RetroMonde]

I'm supposed to mail this today and just noticed this message from the buyer--

 code building :B934A buezzer vanhoutte Vero (there are 2 avnhouutes) tkks:)

I'm not really sure what to do with it- hand-write it onto the envelope? Any suggestions? My PO closes in 2 1/2 hours... hoping for a response ASAP. As always, thanks a lot for your help.

[Dawn R]

I'd just write it on.

[RetroMonde]

That's what I thought too. Thanks!