Section 391.4 - Documentary evidence(a) When late charges are waived, the debtor's administrative file shall be properly documented with a memorandum. The memorandum shall contain a brief narrative statement describing the circumstances leading to the waiver and the reason(s) for granting the waiver.(b) A credit report or a financial statement sworn to by the debtor may be required before waiver of late charges is approved for a compromise, suspension, or termination, except where the cost of obtaining such a report or statement exceeds the late charges due.