My husband has worked nearly 4 years for this company. He wants to change jobs. He went to an interview, and was accepted for a new job since he had the answer. He and gave his letter to leave with a week's notice time, giving for his company time to get someone else in his place.
The new job has training beginning on 18 November and work starting on 27 November.
His old company told him that he had to stay a month before leaving. Is it true that he has to give a month's notice to his old company?