I recently asked about a claim that I saw on the letters page of a national newspaper. There was a comment that this wasn't a notable claim. I've asked questions on previous occasions about claims I've seen on newspaper letters pages (here, here and here). There was also a comment on that last one questioning whether it was a notable claim.
Are claims published on the letters page of a newspaper notable?
Does it depend on the newspaper - tabloid / broadsheet, or national / local?
Does it depend on who wrote the letter - expert / celebrity / random member of the public?