morally yes and repayment terms is somethign to be agreed with between the two parties, Legally i'm not 100% sure where they stand but here is a situation we have runnign at the mo
Employee left giving no notice just didn;t turn up for work, the bacs run had gone meaning we had paid them for the month's work a week of which she didn't do. We have written to her requesting the money be returned and advising we will take legal action if she doesn't.
reality - its a bluff we won;t take action over the money as its not worth the time and legal fees to us.