Posted By:
BobI have seen cards with pencil marks on the back erased and they sail through grading but on the other hand I had one with a very light pencil mark which I erased and the grading company caught it and sent it back "altered." You just never know.
I have a couple of Obaks and a couple of M116s which once belonged to Buck Barker and have his chicken scratching writing all over the back in red or blue ink. Because of who he was, I kept them. I had PSA slab them as PSA MK cards.