You are talking about a kind of recruitment in which the labour supply is highly elastic. Just think of a situation where the labour is inelastic and you require the talent and skill the persons possessing which are very limited. You will show everything in the offer letter. Therefore, not showing details which are relevant to any offer is not a good practice. Hiring risk is to be borne by the employer. It is not for the employer alone, but the employee also has to bear risk because changing an employment itself involves an element of risk and he does not know what the culture of the new organisation is and if it does not match his expectations, he is stuck. Therefore, we should be very transparent while preparing the offer letter. and should include everything possible to be disclosed and if the candidate does not turn up after our waiting for him for months, it should be dropped as such, thinking that he is not meant for us. Remember that there are companies which will extend the date of joining and withdraw the offers given after making the candidate wait for months. This has been happening in the campus selections. Many companies participate in the campus selection and figure out in the placement brochure of the institution but will withdraw the offers later on. Will the candidate file suite against such companies? No. They leave it saying that that is not my coffee.....!