Royal Mail wants permission for its postmen and women to be able to leave some post with a neighbour if the addressee is not at home.
It wishes to trial the idea for mail that is too large to post through a letter-box, and for some post that requires a signature.
Special delivery mail will not be included in the planned pilot scheme.
Watchdog Consumer Focus said that while some consumers would welcome the idea of being able to have mail left with a neighbour, "worryingly there is no opt-out option".
Systems that require opt out are always dangerous & cause problems
This ought to be an Opt In system as used by many parcel carriers