Foreign masked number

An unknown person regularly calls me from a withheld number, telling me that he is abroad

why do you talk to him if you don’t know him?
what can two strangers discuss if they don’t have a common interest?
where did he get your number?

if people call me, whether from a withheld number or not, I expect them to introduce themselves and state the reason for their call
and if that doesn’t suit me, I thank them and say goodbye more or less politely depending on the circumstances
(except for people who "in collaboration with EDF" offer thermal assessments)

it seems to be more of a problem of personal private relationships than of phone calls, go see a detective and a lawyer if trust is lost

But here, there's no need to be cunning.

For some, politeness is innate. Behind every keyboard, there is a human being... who only wants to be helpful, as long as one is a little respectful towards them...

I am one of them.

By using politeness

Even with all the courtesy I use, my correspondent, whom I know well, is accustomed to lying and will not meet my expectations with polite words. I need to be clever to catch him off guard.

Thank you for your reply.