How To Write A Personal Letter For Inquiry . As a business letter, the structure of an inquiry letter is the same as the others. An example of letter of inquiry or a letter of inquiry format is sufficient. Email Reference Request Letter Collection Letter Template Collection from simpleartifact.com Here, in a respectful, correct form, it is necessary to state the essence of the inquiry and indicate the reason for the request (“based on the results,” “for resolving the issue,” “based on negotiations,” etc.). Choose a topic to view inquiry letter templates: Since you are not entitled to a response, you need to use a respectful tone to request for the required information.