If you can get hold of them you are unlikely to get very far.
They’ll likely just tell you that as you are not the tax payer they won’t talk to you.
Yup.
A good few years ago, a mate of mine stayed at my house for a few months whilst he was sorting his life out. For several years after that, I’d get his P60 through the post every year. I rang HMRC on more than one occasion and got the same spiel every time; I wasn’t the person named on the letter so they wouldn’t talk to me due to data protection. The fact that they were sending me someone else’s details (including salary information) through the post seemed of lesser concern to them.
I’d probably ring them anyway just to avoid any “well, why didn’t you notify us?” questions down the line, but I wouldn’t for a moment expect to actually get anywhere.
I’m getting about 6 a day like this… Email address even looks genuine, but the email has spelling mistakes, asks me to click on a hyperlink then “fill in my details on the web page”, and there’s no signature or anything in the email.
That is a known scam, it’s been going for a couple of years. There’s a page on HMRC’s website about it.