Schengen visa on arrival is possible only in case of a real emergency.
In order to apply for the visa on arrival, we always require a letter requesting an emergency visa, including supporting documents.
We arrange the Schengen visa not only on arrival at Amsterdam Airport, but also in other countries and airports in Europe. The same regulations apply to the visa on arrival in these countries as apply to the visa on arrival at Amsterdam airport.
We know from experience that the authorities in different countries have divergent practices.