What is maximal period of leaving Germany without losing visa validity (especially for BE and NE)?
Preferably indicate the low or regulation paragraph.

How what is practically proved and verified? (Tax, entry/exit stamps in pass, registration at city hall, or some insurances?) Dose someone know how they are working in this topic?

In AA they told about 6 months for NE, and 0 months for BE. But every (actualy - most) time I visit them I have a feeling that they need a week of thinking before answering my question.

Thanks!

How what is practically proved and verified?

The answer of your question is itself! They look at your visa in passport at airport and compare it with current date!

In AA they told about 6 months for NE, and 0 months for BE. But every (actualy - most) time I visit them I have a feeling that they need a week of thinking before answering my question.

You must do, because wherever you are you must follow the rules there! It's true, you can't go away longer than 6 months.

By the way, in the last months the quality of questions are getting more and more "general". Detlev, I think the profile of the incoming users/questions are approaching to http://info4alien.de/. I thought this forum is intended for IT-specialists?

Regards,
Klenze17.