Employee's failure to report illegal energy theft constitutes serious breach of duty, dismissal upheld.

The Supreme Court dismissed the cassation appeal filed by Halina S. against her dismissal for failing to report illegal electricity theft at her workplace. The lower courts initially found the employee unaware of the irregular metering, but the Supreme Court ruled that her position and the significant bill reduction made such ignorance unreasonable. Consequently, the court held that the employee had a duty to inform her employer, and her failure to do so justified the termination of her employment contract.