Dear Friends,
Let me put this across in the HR point of view.
By not giving a farewell gives raise in the minds of good, talented, target oriented employees that "how hard they work, company will not recognize, it always thinks a better replacement always available in the market," which will inturn lead to just sticking on to the targets. Innovative desires to improve working atmosphere is nailed down. Company will be a place of marking debits and credits and no point of talking about mutual welfare. As a result, people will leave the company without giving notice, not enough time to find a suitable replacement, attrition problem, etc.,
Giving a farewell: Keeps the employees feel that they are relived with dignity. This will also helps people leaving the company are relived properly by giving notice, will help to find a suitable replacement with a comfortable time limit.
Well in your case the possiblity of the employee rejoining the concern back after marriage at some point of time is also possible, which again is an advantage to the company for it gets a hires a person who is familiar with the policy and procedure.
DO GO FOR A FAREWELL.
Regards,
Battacharya