Officially, no.
Unofficially, sure. My parents have both passed on from this life, and I have “felt” their intercession whenever I have looked up and prayed. Once, when my old van broke down and I needed a new car, I prayed, “Dad, I cannot do this alone. I never did have your mechanical know-how, but I sure could use it now. I believe you are in heaven, so please put in a good word to The Lord for me and help me out so I don’t get ripped off.” And sure enough, I ended up with a new car that has been wonderful to me.
Recently, my mother passed on, and during a tough period, I prayed, “Mom, I know how you suffered in this life and how you certainly did your purgatory here with your disease. I have no doubts where you are, and that you are surely hanging out with Mary right now, so I would appreciate you two going to Jesus and asking for this help at this time.” I was then blanketed by a warmth I cannot explain further, other than I felt my mom’s presence!
So I may not have my bishop’s blessing, and I cannot prove it further than my own testimony, but I know it to be true.