I applied for a Schengen visa for the first time along with my family from the Spanish embassy. We were given visas successfully. However, they stamped a note only on my passport (probably because I am sponsoring my family?) that says:
Please report back to the Spanish embassy or consulates upon your return to Pakistan before 25-08-2017. Failing to do this would result in rejection of subsequent visa applications.
What is the purpose of this? Do they want to check whether the main destination of stay and first point of entry was "Spain" itself, as stated in my application?