Filing export declarations
There are 4 ways of filing an export declaration.
Other than in exceptional cases, you must submit the export declaration electronically.
You are only permitted to file the export declaration in writing in situations where you as an economic operator are allowed to use the emergency procedure.
In certain situations you are permitted to file the export declaration verbally. Examples include passenger's baggage.
Declarations by 'some other act'
Sometimes you can file the export declaration by performing a particular act. Examples include making a declaration by passign Customs at a designated place. At Schiphol for example.