In late 2012 I bid on a service at a charity auction and won it. In early 2013 I attempted to use the service, but the provider said there were only two days on which I could use the service so I said maybe later in the year or next year. This month (now 2014) I tried to use the service again only to be told by the provider that he is no longer able to provide the service plus it had expired in 2013 anyways. Flaky person.
So, I figure I'd just write it off as a tax deduction to the charity. In what tax year can I do it and what sort of documentation do I need?