I am an Indian and I want to change my son's name(drop a middle name). This is updated on his birth certificate. Now the passport needs to be updated (i am in touch with Indian consulate in Frankfurt for this) and then I have to get his permit changed. Does anybody have experience with a similar situation? Would the Ausländersbehörde give me an updated blue card if I show them the name change on birth certificate and passport? or could it get into complications?