How To Write A Letter To Corporation Office . Address your letter to the customer service department. Hope you will do the needful favourably with an immediate effect, which will help to avoid other encroachments also in our area. 5+ Formal Business Letter Format Samples & Example Best Printable from calendarbest.com For instance, dear ujjawal smith. If you know the person’s job title, write it on the second line. Letter to government example 1: