ISEA is accredited by Cognia, the largest educational accrediting agency in the US, recognized by the Department of Education.
When you enroll in ISEA Full English, you get quality content, a Guatemalan certificate or diploma issued by the Ministry of Education, and a US transcript or High School Diploma.
If you need, ISEA can issue a transcript or diploma with the Hague Apostille affixed by the California Secretary of the State; this seal makes every document valid in any of the 122 Hague Convention signing countries.
You can find more info in Spanish on this page: https://isea.edu.gt/apostilla/.