In order to extend my visa, I went to the immigration office. It opens at 9’o clock and at 8:30, there was already a long waiting line outside, in front of the main entrance. At 9’o clock, only 20 people entered the building. The rest of the people waited, without further information, standing outside aprox. 4 hours without any chair, awning, etc.
example from Immigration office / Halle / Germany
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