The way to lodge a complaint about the property dispute of engagement is to specify the identity and contact information of the plaintiff and the defendant, the fact that both parties are engaged, the items and amount of bride price payment, the time and place of payment, the degree of fault, the length of life with * * *, whether there has been a birth relationship, the economic situation of the payer, etc. Finally, sign or seal after the date. Legal basis: the Supreme People's Court's explanation on the application of marriage and family series (1) Article 5 If a party requests to return the bride price paid according to custom, the people's court shall support it if it is found that it belongs to the following circumstances: (1) Both parties have not gone through the marriage registration formalities; (2) Both parties have gone through the marriage registration formalities, but they have not lived together; (3) premarital payment, causing difficulties to the payer. Article 1042 of the Civil Code prohibits arranging, buying and selling marriages and other acts that interfere with the freedom of marriage. It is forbidden to ask for property through marriage. Bigamy is prohibited. Spouses are prohibited from living together with others. Domestic violence is prohibited. Abuse and abandonment between family members are prohibited.