I’m jumping into this thread because a colleague of mine went through a nearly identical nightmare about a year and a half ago.
Basically, after an absolutely brutal day at work, she made a clerical error—she misentered a digit in an account number during a transaction. The woman who was supposed to receive the funds realized the money hadn't hit her account and started complaining, so we called the bank. They contacted the client immediately, of course, because under US law, since I’m just an individual who messed up the transaction (even though it happened via Company A), the bank can't just move money around at will—they have to protect the client, so it becomes a matter between her and them. From what I gathered, they tried calling the guy several times, but he just refused to show up... he even ignored three formal notices from the bank, staying completely MIA. Eventually, the bank told us they were totally stuck because the client wouldn't respond or come in to see a personal banker—and honestly, if they had used security footage to identify him just to force a meeting, it might have backfired and made things look even more suspicious for her. But yeah, he just stayed ghost.
What the bank suggested was that they could release his information, but that requires a court order, which takes forever to process and costs a ridiculous amount of $133 in fees.
The woman was understandably livid—she’d handed over cash directly from her own wallet (this was all regarding a receipt for $1.50)—but there was a complication: her payroll was processed through official channels, yet my colleague had handed the cash over physically, so it looked like the whole thing was being recorded as one shady, unverified transaction.
After waiting a month for that court order, she finally got the client's details, but the bank wasn't exactly rolling out the red carpet for her—there was a massive backlog and long wait times. She tracked down the client, who offered a bunch of excuses, and shortly after, she filed a lawsuit. The police couldn't do anything about it, because from what I understood, the money wasn't "stolen" with criminal intent; it was essentially "gifted" by mistake, so the only recourse is a private civil suit.
Every single time she had to consult with a lawyer—every bit of legal advice—it cost her $167, which the defendant would eventually be liable for along with interest, but getting that money back is another story. In the end, the lawyer ended up costing her about $1000. As for court costs, they were waived for the defendant because he was basically broke—just some student who blew through the money immediately. She spent about eight grueling months dragging herself to hearings, and they weren't even in the same city... at the very last hearing, I think she actually had to cover his travel expenses to get to the courthouse.
She was so close to throwing in the towel. Based on the court's estimate, it wasn't even a huge sum of money; the student only had to pay back the principal plus the cost of one lawyer visit, and if I recall correctly, all her meal expenses over the course of a year. My colleague was right on the edge of a total nervous breakdown—between the exhaustion and the money she bled out in the process, it ultimately wasn't worth it.
In my humble opinion, if something like this happens and the client refuses to sign a withdrawal authorization, unless it's a massive amount of money, you're just fighting a losing battle that isn't worth the stress. So, please... use your head and stay incredibly mindful when doing your accounting work.