Dependents are considered disabled persons in the provision of other citizens, or to receive from them financial assistance, which was their primary or sole permanent means of livelihood.
Disabled persons shall be:

children under the age of 16, and if they study up to 18;

- invalids of all groups;

- older people (women over 55 and men 60 years), regardless of whether or not they are old-age pension or for health reasons.
In some cases, the dependents can be recognized and other groups of citizens who do not have the opportunity to earn a living (for example, people sitting with the child, but not having the opportunity to make maternity leave, or unpaid volunteers caring for the sick and not having the opportunity to work and earn). It is important that financial assistance was provided continuously, not periodically, or the fact of being dependent is not proven.
For the proof of a dependent to provide proof housing-operational organizations, local governments or from work someone dependent is someone close and also a certificate from social security authorities.
As these documents are not legally prove the fact of providing permanent financial support to the dependent, you can back them up with testimony of witnesses, namely your neighbors, relatives, medical and social workers, police, etc. it is Important that testimony was provided in written form, and to make sure you have at least three witnesses.
These documents will help you in court to prove the fact of being dependent on the other person. But when considering issues related to inheritance or the provision of social payments and benefits, you have to provide the court decision confirming the fact of permanent dependent, and the reference listed above.