It was reported by our local news that a couple dining at Jamie's Italian was mistakenly charged $98,638.93. It was discovered when they tried to buy something at port and their Amex was declined. RCI reversed the charge but it still appeared on their card. Imagine if they only brought one card? I don't think this was their case but I'm always nervous about something like this happening so I always bring more than one card, especially when traveling far.
I guess the take away here is always check your onboard account, don't use a debit card and bring more than one credit card. What a nightmare!
https://www.local10.com/news/local/2022/09/14/couple-charged-nearly-100000-for-dinner-onboard-cruise-from-fort-lauderdale/