With its ruling no. 20068 of 7 October 2015, the Cassation Court confirmed that the dies a quo for the start of the 180 days for filing an appeal coincide with the date when a letter is sent by the employee challenging the employer’s dismissal and not the date the employer receives such letter. This interpretation which is unequivocal in case law, allows the worker to calculate with mathematical certainty the deadline for filing a lawsuit.