To issue a certificate of lost time, it is necessary to print out a copy of the salary table for three months before the accident, and then affix the financial seal of the unit, otherwise it will not be recognized. And the work unit where you work also needs a written certificate that can prove that the party concerned works here, which will be issued by the unit. Write down the average monthly salary and absenteeism time, and finally sign and affix the official seal of the unit by the person in charge of the unit.