Start with the evidence
Locate the fee record and the activity or period it relates to. Separate a clearly documented fee from an unexplained difference between two totals.
Work through the example
A USD12 fee appears on a settlement detail with reference F-91. Keeping that source beside the deduction makes the review stronger than labelling every USD12 difference as the same kind of fee.
Make the next step clear
Preserve the provider’s wording and ask the responsible reviewer about classification when needed. A matching amount does not establish that two charges have the same purpose or treatment.
Keep the source context
Use confirmed source records and keep their dates, references and currencies visible. A payment request is not a receipt, a provider status is not necessarily a bank entry, and a net settlement may combine several components.