When and where
Timestamp and site, not just a statement total.
WEX
WEX recorded the purchase. It did not record the tank.
WEX is a common fleet card. The audit question is the same as any other card: did those gallons meet a truck you own.
Price is not the mystery
Finance can already see WEX spend. The mystery is operational. Which charges have a tractor, which charges have only a typed number, and which charges have neither.
I will not shop your fuel price. If the gallon is real and the truck was there, the price is a purchasing topic, not a theft topic.
Prompts and products
Unit prompts, odometer prompts, and product codes are clues. A wrong odometer with a right truck is a sloppy prompt. A right-looking prompt with no truck is a review.
DEF, reefer, and bulk fuel can live on the same card. I label them from the evidence. I do not assume every gallon is a tractor saddle tank.
What I look for
A WEX line I can use
What was typed
Unit and any odometer prompt, kept as typed.
What moved
GPS for the tractor that was supposed to burn it.
Short answers
Before you book.
No. I am independent. I read what you can grant. I do not sell the card.
No. Read-only. Limits stay with your card admin.
Next step
Let's put WEX next to GPS.
If finance has the statement and operations has the trucks, the audit is the missing join.