This is not good advice. Although it is true that you don't need to sign these docs, many countries have very low legal requirements for statutory redundancy pa

This is not good advice. Although it is true that you don't need to sign these docs, many countries have very low legal requirements for statutory redundancy pay. UK definitely, US too I believe. If the company is offering more compensation and you are ok with the strictures of the paperwork, then it is entirely sensible to sign. However, as I said further up the chain, this is a legal document and it's worth getting a professional opinion. Obviously, if the document has strictures that you don't want to or can't agree to, then absolutely don't sign. You are definitely not obliged to but the company is then only obliged to provide the legal minimum.