I am an Indian living in Erlangen, Germany. I am planning a trip for my mother to visit me. I have all the necessary documents for applying for her Schengen visa. I would like to know if it is possible for us to apply for a Schengen visa valid for 2 years. That is, the validity of the visa is 2 years, but her intended stay shall be 90 days.
I have acquired the Formal Obligation Letter (Verpflichtungserklärung) from Erlangen City Hall. This letter permits me to host my mother for 2 years. I am filling her visa application form now and I don't know how to specify this "2 year period of validity" in the form.
Is there a way to specify the period of validity of a Schengen visa in the application form. If not, how do I convey this to the officials responsible?