More of a 'proper protocol' question?

[skanrashke.livejournal.com]

I recently finished a commission, which is very overdue. I attempted to contact my commissioner, to let her know it was finished(We hadn't had much in the way of contact- I emailed her WIP shots when I could and didn't get much in the way of a response), but haven't heard squat from her in a little over a week. I have her physical address, but I'm afraid if I mail it to her she may have moved or something? 

Any ideas what I should do in this situation?