Learn English – Looking for a formal equivalent phrase for the adverb “personally”

adverbsword-choice

Which one is correct: "personal basis" or "individual basis"? I want to use it in a formal letter. I want to say: "I don't know Mr. X on a personal basis (or individual basis) and I have not had an opportunity to work with him". I want to avoid saying "I don't know Mr. X on personally". In fact, I am looking for an equivalent phrase for the adverb "personally".

Could someone help me?

Best Answer

You can say I don't know Mr. X personally... and there's nothing informal about it: it's just a statement of fact. You might want to explain a bit more about how you do know him, though: ...but I'm familiar with his work...