Everyone makes mistakes! Even the "big guys".
It is part of what we do, we are people, we are not perfect.
The thing that sets the professionals apart is the way a mistake is handled.
There are a few different ways to handle a mistake.
One option that some people try is to pass the blame. "It isn't my fault", "someone else messed up". All this does is make you look helpless. You are supposed to know what you are doing, you are supposed to be the expert. But you are at the mercy of whoever made the mistake. Not good.
Some people just try to hide and see if the thing blows over. Very easy to do on the internet where things can be a bit impersonal. Certainly does not make you very professional and won't gain you more trust from your clients.
Honesty is the best policy. You heard it from your mother first - and it is still true in business.
I recently made a mistake on one of my websites - www.3dayfiresale.com. On this site, I offer for sale tools that marketers can use at great prices that can't be beat anywhere. Once I send out the emails letting people know what is on sale, the sooner you buy, the cheaper it is. The price goes up on it's own over time.
The mistake I made was very foolish but very serious. I didn't double-check my download links. Turns out I didn't have available all of the files I was selling. So I sent out my email and people started to purchase - but they couldn't download the files. Big problem. What did I do? Well, I didn't run away and hope people would leave me alone. I didn't try to pass the buck. I sent out an email to everyone and let them know there were some problems and we were working to resolve them. To make a long story short, I was able to recover the main item I was selling but I was not able to provide the bonus that I had offered. So I emailed everyone the main product. Made it as easy as possible. I didn't tell them to log in and download the product, I emailed it straight to them. I also let everyone know that the bonus was not available and then I gave my customers 2 options. Everyone had already received the actual product and now they could either receive a FULL refund, OR, they could chose a replacement product and have any one product that we offer on our www.3dayfiresale.com website. Now this was especially attractive since I had run this particular sale at a great discount and was now offering any other product as a replacement. The result? Well about 25% of the sales that day got refunded. No problem. About 30% of the clients chose another product to replace it. That was great, I still made the sale. The rest of the people were just happy they got the main product and didn't ask for either option. Even better! Sale made, mistake admitted and happy client.
One thing you don't want to do is over-compensate. You see it online, someone makes an error and offers back the whole farm. All this does is make you look like some cheesy salesman that can't be trusted or like you have some ulterior motive behind you.
All you need to do is be transparent, don't hide, admit your error and fix it. People will trust you more knowing that they are sure to get value for their dollar and that they aren't getting ripped off.
That is the best way to handle your mistakes - and keep your client's trust.