The Education Ministry submitted an amendment to Parliament on Friday that would force teachers at state schools who are granted paid postgraduate study leave to produce evidence of the qualifications they have gained while away from work.
According to the would-be law, the teachers will have to submit their degrees before they resume work.
Anyone not complying will be forced to return the pay they received during their absence.
Deputy Education Minister Simeon Kedikoglou said that some teachers had abused the study leave system in the past.
“Such behavior was unacceptable and tarnished the very useful practice of granting study leave,” he said.