It is not just at Halloween when unexpected callers turn up on your doorstep.

Remember official visitors should always make an appointment beforehand
Look through the door view or window to see who is outside.
If you decide to open the door, put the chain or bar on first.
Check the caller’s details before you let them into your home. Telephone the relevant organisation to confirm the caller’s identity
Do not rely on a phone number that the caller gives you.
Do not feel pressurised into buying items on your doorstep and be wary of callers who may offer home repairs or gardening. Report any unexpected traders to Consumer Direct on 08454 04 05 06.