When obtaining a certificate for widowed remarriage, it is necessary to provide: my household registration book (if one spouse dies, I need to bring a "death certificate" to the police station to change the relevant information), ID card, a signed statement stating that I have no spouse and no direct blood relatives or collateral blood relatives within three generations with the other party, and three 2-inch recent half body bareheaded color photos (can be taken on-site).
Relevant legal provisions on marriage registration
Article 5 of the Marriage Registration Regulations stipulates that mainland residents who apply for marriage registration shall provide the following documents and proof materials:
（1） My household registration book and ID card;
（2） I hereby declare that I have no spouse and no direct blood relationship or collateral blood relationship within three generations with the other party.
Hong Kong residents, Macau residents, and Taiwan residents who apply for marriage registration shall provide the following documents and proof materials:
（1） My valid pass and ID card;
（2） A statement notarized by a notary public in the place of residence stating that the individual has no spouse and no direct blood relationship or collateral blood relationship within three generations with the other party.
Overseas Chinese who apply for marriage registration shall provide the following documents and proof materials:
（1） My valid passport;
（2） A certificate issued by a notary public or authorized agency in the country of residence, authenticated by the embassy or consulate of the People's Republic of China in that country, stating that the individual has no spouse and no direct blood relationship or collateral blood relationship within three generations with the other party, or a certificate issued by the embassy or consulate of the People's Republic of China in that country stating that the individual has no spouse and no direct blood relationship or collateral blood relationship within three generations with the other party.
Foreigners who apply for marriage registration shall present the following certificates and supporting materials:
（1） My valid passport or other valid international travel documents;
（2） A certificate issued by a notary public or authorized agency in the country of residence, authenticated by the Chinese embassy or consulate in that country, or authenticated by the Chinese embassy or consulate in China, stating that the individual has no spouse, or a certificate issued by the Chinese embassy or consulate in China stating that the individual has no spouse.