Tax avoiders to get warning shot from HMRC
24 November 2012 Last updated at 09:05 GMT
Hundreds of suspected tax avoiders are to receive letters in the coming weeks warning them that their financial affairs are facing special scrutiny.
HM Revenue and Customs (HMRC) is sending letters directly to 1,500 people who it believes have signed up to one particular avoidance scheme.
Theo Leggett reports.