'Finders, keepers; losers, weepers' is not a valid excuse for keeping someone else's property.
'Znalezione nie kradzione' nie jest dobrym usprawiedliwieniem dla zatrzymywania cudzej własności.
A valid excuse is necessary to avoid penalties for missing the deadline.
His valid excuse for the delay satisfied the manager's concerns.
I got a slating from my coach for skipping training without any valid excuse.
The principal shortened the reins once students began skipping classes without any valid excuse.
Dyrektor dokręcił śrubę, gdy uczniowie zaczęli opuszczać lekcje bez usprawiedliwienia.
A late submission can sometimes be forgiven if accompanied by a valid excuse.
Everyone understood when he presented his valid excuse regarding the missed deadline.
His valid excuse convinced the teacher to allow him extra time on the project.
A valid excuse might protect you from negative feedback at work.
I didn't believe her at first, but she had a valid excuse to share.
He couldn't find a valid excuse to explain why he failed the test.
I hope my travel plans can count as a valid excuse.
His explanation was a valid excuse in the eyes of the court.
Jego wyjaśnienie zostało uznane przez sąd za dopuszczalny argument.