This. I'm also happy to phone a direct number that they give me (e.g. subdepartment), as long as I can find the telephone number listed on their public web site

This. I'm also happy to phone a direct number that they give me (e.g. subdepartment), as long as I can find the telephone number listed on their public web site. The sticky ones are things that seem to somehow be tied into people at the actual company scamming - my parents recently got a scam Openreach call within a few hours after calling to complain that their telephone had been disconnected a week earlier than promised. They had knowledge of the complaint call, but did the standard scam walkthrough of looking at event viewer and asked for the router ip address. See also the conveyancing scams whilst buying houses where phishers impersonate the exact solicitors email format and know exactly when the monetary transfer is supposed to take place in order to get you to pay a different bank account.