
Technically she would be obliged to pay the costs back BUT there is a point as to what training can be expected to be paid by an employee.All new jobs require some sort of training so it depends very much on how specialised the training is and also WHY she wants to leave. IE if she has a genuine reason for leaving.
For example if you gave this contract to someone training as a receptionist and you asked her to pay back train costs because someone had to train her for a week, costing a full weeks wage to a company , this cost would not be the type you could claim back IMHO
These sort of cases are all judge on their own merits. It is always a bit difficult to give advice without the "whole" picture. Contracts as we know are only enforceable if they are fair to both parties. :-)
Is it your company or are you HR just wondered if you could expand :-))))