Decide, by what right are you going to prove their nationality. There are two options: a law of blood and law of soil. In the first case, it is sufficient to collect the documents that confirm your kinship with the representatives of the nation need you, even if geographically these representatives do not live on the territory of the national state (e.g. Jewish by birth, living in Russia, the legislation of Israel and still be considered Jews). On the contrary, if your ancestors for a long time lived on the territory of European States (e.g. Poland), you can prove this fact his attitude to the nation of the poles.
Take the birth certificate of their parents or grandparents. The nationalityspecified in them, will be yours, adjusted for the particularities of some countries. So, if in Russia belonging to a nation is determined by the father in Israel - mother. Attach a birth certificate of the father or mother documents proving your relationship, and with this set, please contact that organization, which is required to provide evidence of your nationality.
If you need to prove the nationality for expatriates and documents confirming your right to receive citizenship in another country, not preserved or nationality they are not specified (documents of pre-revolutionary), see the specialists. Make a request to the Consulate or Embassy of the country where your ancestors lived. Along with a petition for repatriation request information that in a certain period of time the person who is your direct ancestor lived in the territory of that state.
Ask for advice in the community or at national-cultural autonomy of the nation, belonging to which you need to prove. Either hire a lawyer specializing in the repatriation.
Advice 2: How to change nationality
According to article 26 of the Constitution of the Russian Federation, a man with a Russian passport has the right to determine their nationality. That is, according to law no one can prevent you when you want to change nationality.
Apply for making changes in the column "nationality" in Registrar office (the bodies of civil status acts at the place of residence. The statement can be written in free form to the name of the office of the Registrar. The application should consist of: the petition for the change of nationality, the date of signature of the applicant. To submit such statements allowed not only the place of residence and place of birth.
Collect all required documents: birth certificate, marriage certificate (and, if applicable, divorce). In that case, if the change of nationality takes place on the basis of different nationality of the father or mother is also required birth certificate of the father or mother.
Please be patient, as the statement about change of nationality can be considered within one month. For some reason, which defines the office of the Registrar, the processing time can be prolonged, but in any case may not exceed two months.
Be prepared for the fact that, despite an article in the law on the right of self-determination in the matter of nationality, your application will not be accepted. The fact that this procedure is performed rarely, and the law is relatively new. And in reality, the employees of the registry office can refuse your request on the basis of internal laws of the Registrar's office. In each region of the country causes of failure can have different causes. In this case, you will find the next step.
In case of failure again with all the documents, please contact the district court of the city, and serve on the trial. The basis of the statement becomes article 26 of the Constitution of the Russian Federation, according to which every citizen of the Russian Federation has the right to determine and indicate his nationality alone. According to this article, no one should be forced to determine their nationality. And thus prevent the change of nationality.
The Russian passport there is no column "nationality" (but it was the passport of the USSR), and the nationality is not specified in any other document, except in the birth certificate. Essentially, this means that belonging to one or another nationality in Russia may not affect anything.