Travelling on a visa
Even if you have a visa you may still be subject to checks during your trip. If you want to travel to the Netherlands you must meet certain requirements.
Entering and staying in the Schengen area
You must at all times meet the requirements for travelling without a visa. For example, you must have enough money for a return ticket.
If you do not meet these requirements you may be refused entry to a Schengen country or the Schengen area.
Extending a visa
You can only extend a short-stay visa in emergencies, for example if you become ill. Strict conditions apply.