Handwriting is valid. Whether the divorce agreement is valid or not has nothing to do with its form. It mainly depends on whether the agreement has agreed on such issues as property division, child custody and visitation, spousal support and child support, and whether the two parties have expressed their true intentions when signing the agreement. If so, the divorce agreement will come into effect after both parties have gone through the divorce registration procedures.
Legal basis: Paragraph 1, Article 11 of the Marriage Registration Regulations
Mainland residents who apply for divorce registration shall present the following certificates and supporting materials:
（1） My household register and ID card;
（2） My marriage certificate;
（3） A divorce agreement signed by both parties.
