Is a will legal if signed on a piece of paper by both parties?

Yes, a will can be legal if it is signed on a piece of paper by both parties, provided it meets the legal requirements of the jurisdiction in which it was created. Typically, this includes being signed by the testator (the person making the will) and, in many cases, witnessed by one or more individuals who are not beneficiaries. However, it’s important to check local laws, as requirements can vary. To ensure validity and avoid disputes, it may be advisable to consult with a legal professional.