Sorry, my mistake

On a trip to South Africa I incurred a credit card charge that I thought was in error. I was certain that it was the result of a transaction through the hotel where I was staying. Through numerous emails I attempted to get them to accept responsibility for the charge and remove it. I even contacted my credit card company to dispute it. After having the charge removed, I had a nagging feeling that something wasn't quite right about this matter. I could have easily dismissed this saying that I had taken the proper steps to resolve this. I experienced a flash of clarity when I realized that the charge was made at the airport, not the hotel. I immediately called the credit card company and reversed the dismissal of the charge as well as send a letter of apology to the hotel staff. I have learned the importance of taking responsibility for my mistakes and keeping the slate clean. I also noticed a positive shift in my vibrational level as a result of these actions. What mistake have you acknowledged lately with a sincere, "I'm sorry?"