How To Write A Letter Of Inquiry To A Company . So, you can be sure about a certain thing before buying the product. You won’t be making a great first impression if your letter is a mess or hard to read. How To Make A Request Letter scrumps from scrumpscupcakes.com The introduction of your letter of inquiry serves as an executive summary of your letter. A letter also serves as a proof for the business being done between 2 organizations and as a history for future references. We are specifically interested in radio and television advertising.