Yes.
If your bank investigates an electronic-fund-transfer dispute under Regulation E and decides that no error occurred—or that a different error occurred—you have the right to request copies of the documents the bank relied on in making that decision.
If you request them, the bank is supposed to promptly provide copies.
That can be extremely important because a denial letter may tell you things like:
“We investigated.”
“No error occurred.”
“The transactions were authorized.”
But those are conclusions. They do not necessarily tell you what evidence actually caused the bank to decide you were wrong.
So instead of wondering whether the bank has some powerful piece of evidence that you do not know about, you can ask a much better question:
What did you actually rely on?
Maybe the bank has strong evidence that needs to be understood. Maybe what it relied on is much less impressive than the denial made it sound.
Either way, you do not necessarily have to guess.
For a deeper explanation of this right, see:
https://www.cardozalawcorp.com/blog/what-evidence-did-my-bank-rely-on-to-deny-my-claim-.cfm
