I'm sorry for your loss. Are you the legally recognized and/or court appointed administrator of your sister's estate? If not, you can't legally do anything on her behalf until the probate court says you can. So if you haven't seeked legal advice on this in your state yet, I highly suggest you do so immediately. I'd hate to see anyone who's grieving over the lose of a loved one, find themselves in a legal pickle in their efforts to try and help, only to discover the hard way they've violated some federal or state laws. You've got enough to deal with as it is, and don't need more piled on top of it.
