I only have Strongwater solids signed, so I don't know about the boxes or other designers.
I received a certificate of authencity at Strongwater's signings. I bought 2 solids and received only 1 certificate (this happened twice). Hopefully, no one will think I have fakes in case I need to sell one without a certificate. <img src='style_emoticons//ph34r.gif’ border=’0′ style=’vertical-align:middle’ alt=’ph34r.gif’ /> Then again, if you see me selling any, you know I'm having financial problems.