I've had a registered parcel returned to sender when postie hasn't been able to deliver if no-one in.
No card was left, and after 3 weeks or so it gets returned to sender (no Elvis jokes).
They sent it back surface mail as well. :angry:
Luckily, the seller emailed me to let me know after 5 months that he had got it back........
I got it a week or so later, but had to pay the seller to repost cuz it wasn't his fault.
The record.....Jimmie Reed Jr, so worth 2 lots of postage.....
Contact your sorting office if not already done so, just in case it's sat on a shelf like mine was.