The link below can help identify the basic elements of a business letter. I think that you need to take a business letter approach to this because of the formal nature of asking an organization to assist in a professional manner. The content is going to have to ask to waive the late payment charges. It must also explore why the bank should waive the late payment charges. I think that you might also want to include how the bank would benefit from waving the late payment charges. In the end, there should be some type of justification and explanation behind why the bank should do this. One is not declaring the waiving of said fees, but rather showing a case as to why it should be done. I think that with this in mind the letter should be written in the manner outlined below.