A will is the expression of the wish of a citizen for the disposition of property belonging to him in case of death.
Disposition of property in case of death is possible only by the making of a will.
A will may be made by a citizen who has full dispositive capacity.
A will must be made personally.  Making of a will through a representative is not allowed.
A will may contain the disposition of only one person.
Making of a will by two or more persons is not allowed.
A will is a unilateral transaction whose validity is determined at the time of opening of the inheritance.
A will must be made in written form with an indication of the place and time of its compilation, signed by the testator by his own hand, and notarially certified.
Nonobservance of the above mentioned rules shall entail the invalidity of the will.

Source: Iravaban.net