Is it effective to stamp the official seal of the original unit on the supplementary social security form?

Effective. Social security payment refers to the interruption of social security payment for some reason, and it has not been paid in the middle months, but due to recruitment or other reasons, it is necessary to make up the part that has not been paid before, so as to obtain a complete social security period and ensure the normal identification of recruitment and settlement. If the unit pays back, it needs the business license, registration certificate or seal of the unit, employee identity information and other materials.