Legal analysis: It depends on the specific situation. If the family separation order divides the property of the parents, so when drafting the family separation order, it must have the signatures of the parents and the signatures of other family members, otherwise The separation order is invalid until the parents ratify it. If the separation order does not involve the parents' property, it can be effective as long as the relevant family members who created the property sign it.

Legal basis: "The People's Republic of China and the Civil Code"

Article 119 A contract established in accordance with the law is legally binding on the parties.

Article 490: If the parties conclude a contract in the form of a contract, the contract shall be established when both parties sign, seal or fingerprint. Before signing, sealing or fingerprinting, one party has performed its main obligations and the contract is established when the other party accepts it. Laws and administrative regulations stipulate or the parties agree that a contract should be concluded in written form. If the parties do not use written form but one party has performed its main obligations and the other party accepts it, the contract is established.