To waive late fee means your fee is over due and is waived in the sense, is pardoned. The request to waive fee differs, it depends on the fact that whether you are requesting to waive the fee for college or registration or a fee at one of the local federal offices. Procedures and requirements to waive fees are different for all the above cases. Fees will be waived in case of a problem with financial aid, financial difficulty, economic reasons etc. if you have any of the above problems you can mention them in a letter and apply to waive the fee. Most offices and universities have a form for request to waive the fee. You can find the form at the college or local federal office and fill it.