Code of Civil Law
Section IV, Chapter 8
Heir - an entity to which the entire rights and obligations of a deceased person pass.
Testamentary heir - a natural person, legal person or an organizational unit without legal personality, appointed for the inheritance on the basis of a will, or a child conceived (not yet born at the time of opening the inheritance), provided that he is born alive.
Legislative heir - an entity appointed for inheritance under the relevant laws, if the testator did not leave a valid will, or if the persons appointed to the inheritance do not want or can not be heirs.
Legislative heirs (note the change in inheritance law from June 28, 2009):
descendants - children, grandchildren, great-grandchildren, etc.
introductory - parents, grandparents, great-grandparents, etc.
siblings and descendants of siblings
descendants of grandparents - uncles, uncles, aunts
stepchildren whose parents did not survive the inheritance
the commune of the testator's last residence