Transactions
Posted purchases with time, site, gallons, and prompts.
Comdata
Comdata knows the charge. Your GPS knows the truck.
Comdata fleets often already have the controls and still cannot see a stolen fill next to a typo. The join is the missing piece.
Controls are not a match
Limits, prompts, and product blocks are useful. They do not answer whether the truck was at the pump. A prompt can be satisfied with a wrong number and the charge still posts.
I read the posted transactions. I do not redesign the control set on the first week. If a control is obviously unused, I will say so after the match shows the habit.
Keep the piles apart
A Comdata charge with fuel in a fleet tank and the wrong unit is dispatch. A charge with no truck is a review. A charge on a unit with a wild sensor is unverifiable.
That split is the same one I used for other cards. The brand changes the file layout, not the question.
What I look for
Comdata access I actually need
No money movement
A login or file that cannot move funds.
The other systems
GPS and, if you have it, the TMS. The card alone is not the audit.
Short answers
Before you book.
No. You grant the read. I do not sit between you and the card company.
They stop some sloppiness. They do not prove a truck was present.
Next step
Let's match Comdata to the fleet.
15 minutes. Tell me who administers the cards and who can see GPS.