Why does a will need to be witnessed?

After writing a will, you need to sign it alongside two witnesses to make it legally binding. First, you should sign your will with both witnesses watching, then each witness should add their signature alongside details like their name, address and occupation. This is so that, if your will is contested in the future, your witnesses can testify that they watched you sign your will.

Another reason your will needs to be witnessed is to demonstrate testamentary capacity…