You should be wary of other types of schemes, not just those listed here. If you are offered a way to pay less tax that sounds too good to be true, it probably is and be aware, HMRC never approves any scheme.
You are responsible for making sure that your tax return is correct - so make sure you understand what you are signing up to. If you do use an avoidance scheme you will be subjected to an HMRC enquiry.
Download a briefing about how HMRC is tackling tax avoidance (PDF 954K)
If you want to report a scheme that you believe has been set up to avoid tax, you should let HMRC know.
Contact HMRC to report a scheme