Your school may have merged with another school or hospital which may also house these documents. In this situation, please request the new institution to send your documents with an explanation letter.
In other situations, find out if another organization in your country (such as the Ministry of Health or Department of Education) has been authorized to store your school records. If you either can’t find this information or find it difficult to find (due to refugee status/war/natural disaster in your country), contact CGFNS Applicant Navigation Services.