Check your letter
Last reviewed 2 September 2026 · How Tax Letters checks its facts
We do not keep your letter. Nothing you paste is stored, logged or used for anything except answering you.
Before you paste: what gets removed automatically
Best practice: take out names, addresses and reference numbers before you paste. Tax Letters automatically redacts what it spots in case you miss something, and shows you exactly what it removed. No filter catches everything, so leave bank details out entirely.
Your letter is not kept. What Tax Letters reads is the redacted version below. Best practice: remove personal details before pasting; Tax Letters automatically redacts what it spots in case you miss something, and shows you what was removed. No filter catches everything, so leave bank details out.
Got a Simple Assessment (PA302), the letter that states an amount HMRC says you owe? The Simple Assessment checker compares its figures against your own records, which is the better tool for that letter.
This is an automated AI tool: it explains letter types, it can make mistakes, and it is not advice. It carries full guides for the five big compliance campaigns, recognises the letters that carry fixed legal deadlines, and says "we cannot identify this one" honestly for everything else.
Rather read than paste? Pick your letter from the list instead. Not sure the letter is real? Start with the scam check.