Maybe the judge does not believe you are family. He will ask for a DNA test! The DNA test is a proof that you are really related.
How to do a DNA test?
Please go to a laboratory. Ask for an appointment. At the laboratory, you will provide a bit of your saliva. The lab will then send the test to the Austrian Embassy. Your family will need to reach the Embassy and provide a bit saliva too. The embassy will then send back the test to the lab in Austria. The lab will finally have an answer.
A DNA test can cost around €200 per person. You will have to pay for the DNA test yourself.
Example: you want to bring your wife and your 3 children. The DNA test will cost around €1000.
The answer is positive and your family is in Austria? You can have the money back.
The BFA requires a DNA test from your side? Please contact an advisor.