Parcelforce, do i have to sign to receive an item even if it is small enough to fit through the door? -

It depends upon whether or not the sender specified if a signature is required.

UPS absolutely never have me sign anything. They ring my doorbell, the dogs go crazy and I have a box of Medical Supplies delivered from them every month placed in the same place every time! Never do they make me sign anything.

i think so if its pretty big