I was contacted by a webmaster today and their request was to remove their links from my website because they were paid links. The thing is I had removed these links a long time ago. I had a around 2-3 paid links on my homepage back in 2008 and a year or two later I took them down. My question is, is it possible Google to put a penalty on a website because of paid links that appeared a few years ago even though these links may now only appear in the chached version somewhere on the internet?