Reading parcelforces T&C it looks like they forgot one vital thing - to put a card through to say where the item was delivered to.
From their website:
2.1
Parcelforce Worldwide undertakes to deliver to an address specified in the despatch documentation, not to a specific person.
2.2
If there is no-one present at the address then:
2.2.1
the Customer acknowledges and agrees that Parcelforce Worldwide may at its discretion attempt to deliver the Consignment to a neighbouring address within a reasonable distance of the delivery address; and
2.2.2
if this occurs, a Customer Contact Card shall be left at the specified address; and
2.2.3
the Customer agrees that such delivery shall constitute delivery to the address specified as the delivery address in the despatch documentation.
2.3
Parcelforce Worldwide does not undertake to intercept a Consignment in transit before delivery has been attempted.
2.4
Parcelforce Worldwide shall not be liable in respect of any Consignment delivered to the delivery address or other address specified by the addressee, where any person misrepresents his authority to receive a Consignment on the addressee?s or Customer?s behalf, or where Parcelforce Worldwide is delivering it in accordance with instructions from, or purporting to be from the addressee.
2.5
On delivery of a Consignment, Parcelforce Worldwide will request the person who accepts delivery (not necessarily the addressee in person) to sign an acknowledgement receipt, which may include signature by electronic means. Copies of such receipt shall be available for a period of six months from the date of delivery, subject to payment of the charge as then published.
Looking at this point 2.2.1 says they can deliver to a neighbour, but 2.2.2 says they have to leave a card. 2.2.3 means you have to accept this is proof of delvery!! That stinks IMHO. However Parcelforce's T&C state they have to put a card through the original address door, THEY DIDN'T DO THIS. I think you have a claim.
They also don't make it clear, unless you search through their T&C that delivery to a neighbour is considered delivery!! That's shocking!!