Dear …
RE: __(Name)__ - Account #
Please accept this as __(our/my)__ formal request to__(name of organization)__ asking that you waive the __($amount)__ finance charges that have been applied to __(my/our)__ account during the past __(length of time)__. In all fairness to __(me/my company/Name of Organization/etc.)__, I would like to point out that __(I have/my practice/company has/we have/etc.)__ been doing business with __(name of organization)__ for __(#)__ years now. This would be considered, by most standards, to be considered a loyal customer-relationship. Additionally, the high volume of business __(I/we)__ have given to your organization over the years has been significant.
Also, please allow me to point out that __(I/we)__ have always paid our invoices in a timely manner. That is something that__(I/we)__ have never objected to. What has been difficult for __(us/me)__ to accept all along, however, is the interest charges that __(Name of organization)__ has insisted on consistently levying to __(our/my)__ account. As you are fully aware, this has never been conducive to promoting a healthy business relationship between us, as __(I have/Name of Organization has)__ never been in agreement with this practice right from the start.
It is for these reasons that __(I am/we are)__ requesting the reversal of these finance charges. In order to maintain __(my/our)__ continued business, __(I am/we are)__ hopeful that you will seriously consider this request. __(I/We)__I thank you in advance for your consideration and look forward to hearing from you soon.
Yours truly,