BULGARIA – CRIMINAL CODE
GENERAL PART
Chapter Two - CRIME
Section I -General Provisions
Article 14
(1) The lack of knowledge of the factual circumstances, which belong to the elements of the crime, shall exclude the intentional nature of this crime.
(2) This rule shall apply also to acts committed through negligence, where the lack of knowledge itself of the factual circumstances was not due to negligence.
Mental element
Negligence
Knowledge - national proceedings
Mistake of fact - national proceedings
EDIT.