An Advance Decision allows you to record any medical treatments that you do not want to be given in the future, in case you later become unable to make or communicate decisions for yourself. It will only be used if you cannot make or communicate a decision for yourself.
Advance Decisions are legally binding in England and Wales, as long as they meet certain requirements. This means that if a healthcare professional knows you have made an Advance Decision, they have to follow it. If they ignore an Advance Decision then they could be taken to court.
For more information see guidance on Advance Decisions.