I checked both databases (our current and historical backup) and there is nothing. In fact, not a single gift certificate has been purchased by anyone with the last name of Michael in the last decade. I also did a few wildcard searches on the number you supplied, and didn’t get a hit there, either.
Do you remember when you received this gift certificate? Do you know if this was a gift certificate donated to a charity?
Also, it would help to know what the gift certificate looks like. Does the gift certificate you have look like this: http://www.vinology.com/gift-certificate.pdf
Finally, is it on gold or silver leaf stationery? If you can answer these questions, It will go a long way.
I am not seeing it on my end, either. There are a couple things we can do. I would need to know if the gift code was handwritten or not (if it was handwritten, it’s possible it was transcribed incorrectly) and second, i’d need to know the last name of the person who purchased it, and roughly when they gave it to you.
With that info, I can run a wildcard search and locate the gift code for you.