TECHNICALLY it was a pending as of your inspection/effective date. But it sounds like it closed/sold between your eff date and signature date ...
I used to be of the school of thought that TECHNICALLY it should be reported as a pending, but have since revised my thinking some.
Generally I try to find closed sales as of the eff date of my report and stick to that. However, on rare occasions, if a pending has closed in between eff date and sig date, I have used it as a closed IF it is truly one of the "best comps available." If and when I use such a comp, i usually have 3 other closed sales and this is a 4th. I feel it adds additional support of the current market as it literally closed as I was appraising the subject.