HMRC announced today that under new rules introduced by the Financial Secretary to the Treasury, David Gauke, high-risk promoters must now publicise the fact that they are being monitored by HMRC.
The aim is that potential customers are aware of the risks of using these schemes.
A HMRC statement said: "Tax avoidance promoters commonly market schemes which overwhelmingly do not work. Laws introduced last summer allow HMRC to issue these promoters identified as 'high risk' with Conduct Notices requiring them to change their behaviour.
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"The new rules mean if a promoter does not comply with the terms of a Conduct Notice they can be issued with a tougher 'Monitoring Notice', which, among other things, will mean the promoter will be publicly named by HMRC and will have to tell their clients that they are being monitored.
"If they fail to comply with the conditions of the Monitoring Notice they could face fines of up to £1 million."
Mr Gauke said: "The government has taken unprecedented steps to clamp down on tax avoidance.
"Our tough new rules will force high risk promoters to change their behaviour and help protect taxpayers from unscrupulous advice. Promoters who do not change their ways should be in no doubt – HMRC is taking swift and decisive action to use these new rules."
HMRC said it had already written to a number of promoters warning them of the consequences if they don't change their behaviour, and has also sent the first Conduct Notice, which requires a promoter to change its ways.