Answer
Continuing high school education may require recognition of previously completed schooling. The school or education authority determines the procedure based on the child's age, completed grades, and documents from the country the child previously lived in.
For younger children, the process is simpler: they are more often enrolled based on basic documents, an identity document, a birth certificate, and a vaccination certificate. But the older the child and the more grades they have completed, the more important it is to confirm their previous schooling.
In practice, this means that a family with a high school student needs to collect school documents in advance and be prepared for an additional administrative procedure. Otherwise, there may be difficulties placing the student in the appropriate grade, continuing the curriculum, and starting the school year smoothly after the move.