The wrong time to join the party is influential. You can only ask the then branch secretary or other branch members to issue a certificate. In addition, the standard practice is to fill in your application for joining the party, fill in the date when you joined the party, and then the date when you did it. And in the column of "branch meeting passed a resolution to accept the applicant to prepare for party member", the column of "general branch review (approval) opinions" and the column of "grass-roots party Committee approval opinions", it was clearly agreed that Comrade XX should reissue the "Volunteer Letter for Joining the Party".
Because it is a supplementary file, you have to rewrite an application for joining the party, an application for becoming a full member, and a personal autobiography. Fill in the date of the party, then the date of completion, and write the words "write up". These and the supplementary "Volunteer Letter for Joining the Party" and relevant supporting materials are all included in party member's personal files.