unauthorized russian

• самово́льный

  self-willed, wilful, unauthorized, without permission

• несанкциони́рованный

  unsanctioned (unauthorized)

• неуставно́й

  non-statutory, non-regulation, unauthorized, unlawful, irregular, unofficial

• неположенный

  unauthorized, improper, forbidden, illicit, undue

• самовольно

  arbitrarily, without permission, unauthorizedly, wilfully, of one's own accord

• начёт

  unauthorized expenditure

• самово́льничавший

  self-willed, arbitrary, unauthorized, having acted on one's own initiative

• самово́льничающий

  arbitrary, self-willed, wilful, unauthorized, acting without permission

Examples

• Э́то запрещено.It's unauthorized.