I mooched two books from a member. Today the envelope arrived empty. According to the post office - there two stamps on the envelope - the envelope was unsealed and arrived at my local post office empty. I am of course sad for not having the two books... but aside from that, I am not sure what do I do next. Do I mark as received but indicate that I am unhappy? Maybe the member could have used tape rather than rely on the envelope glue, but ultimately I am not sure it is her fault... Am I going to be out of my points? How to proceed? Thanks.