It's not uncommon for visitors to throng at our doorsteps, especially during festive seasons - now a survey has found that an astonishing 95 per cent of Britons still trust unannounced callers.
The survey of 1,063 people by BT's local network business Openreach found that Londoners less open to strangers than people in other parts of the country - 44 per cent hesitated before answering the door and 38 per cent being annoyed by unexpected callers compared with only 15 per cent in the North-east.
Scottish on the other hand, appear the most trusting people in the UK, with 30 per cent saying they answered the door without checking and 20 per cent saying they never asked for proof of identity.
The Welsh were the most relaxed, with only five per cent worrying about unexpected callers, reports the Daily Express.
"London can be a very anonymous place so it's understandable that people are more reticent. If you live in a smaller community, you've got a greater chance of knowing the person on the other side of the door," said Cary Cooper, professor of organisational psychology at Lancaster University Management School.
35 per cent women said they were less trusting than they used to be, and 18 per cent saying they were worried by a knock at the door compared with eight per cent of men.
Cooper said: "Men tend to be bolder but we see both men and women doing the sensible thing and asking for ID before letting callers in.
"Human contact is vital for our happiness and no one wants to live in a society made up of closed doors."