Now in days every consultants use to issue an appointment letter to flexi staffing employees. In fact I am working as a Staffing manager and my all they employees whom so ever has been outsourced by us are getting all the statutory benefits and such require letters as well.
many companies are out source their entry level staff to third party payroll and reduce their recruitment as well as admin charges. It will help them to control on attrition ration and save the additional cost.
for more details pl feel free to get back to me at email@example.com
thanks & regards,
24th August 2015 From India, Pune