Undelivered post, can it be tracked down?

[Terminator X]

Sent some items last week (standard post box no special delivery etc) using a large postage stamp and they have yet to arrive at their destination almost a week later. If it's due to not enough postage will they be held somewhere and can I track them down to collect them? No return address so they'll never get back to me otherwise.

TX.

[TheEnd]

If there's not enough postage, the person at the other end will get a note or letter telling them to pay the shortfall and pick up the parcel.

[dave7692]

I thought the general theme for under-paid postage is that there is usually a note delivered to the address specifying that there is a packet waiting for them but the have to pay the required amount of postage before they can have it.

[BIGDAI]

^^^
This ..... BUT, if the recipients don't collect/contact the delivery office to arrange re-delivery, the item will be treated as undeliverable. With no return address on the outside it will go to the returned letters office in Belfast who will open it to check for a return address. If they don't find one (as it would appear in this case) the contents will be disposed of - either by being sold (if of any significant value) or destroyed.
Best bet would be to phone the sorting office responsible for delivery .... the MIGHT tell you if it's there awaiting collection (but you might have to grovel a bit as they don't have to).