1, required. Property division agreement involves property rights or money, which is more important. In order to prevent disputes, after the agreement is formed, both parties must sign on each page for approval.

2, invalid. According to the provisions of Article 25 of the Inheritance Law, if an heir abandons inheritance after the beginning of inheritance, he shall abandon inheritance before the disposition of the estate. If you don't do it, it's regarded as accepting inheritance, and a page without a person's handprint is not invalid.