Vryl Valkyrie

No there isn't. I wish there was. I called the Concierge to ask the same exact question and spoke to Spike Linden. Hopefully Linden Lab will create that feature soon.. not only for PM's but for bloggers who you don't wish to read their posts.

This is true. I know I've stored stuff away in my inventory that I still have not used. Once I did get around to using an item and it was borked. The best thing to do is for everyone to keep transaction records.

Although 3D Concepts Professional Licensed Textures sells our textures full perm, the box that they come in is copy only. I do this for several reasons, one of the reasons is so that the customer can do exactly what you suggested to prove purchase if need be. To answer your question, "yes" rezzing a copy of the no transfer item should be sufficient. However, for the future, you should start saving your monthly data. There are a few SL Transaction Viewers on the market that is worth checking out. Hope this helps.