Notarization Question

Texas here. Had a parent try to drop off a reason of conscience form for immunizations, but my registrar denied it because one of the dates was written over. It said 2017 and someone wrote 2018. I tried to explain the mother but she was arguing with me, stating she doesn't have enough to pay for another one. I suggested her grandmother sent an email that stated the error, but let me ask to see if that's acceptable. I asked my new AP and she basically told me that we shouldn't accept it and the mother needs to get a new one. She said she can back me up too, but I need to find something law-wise that explains this. Can you guys help me find it? I tried to google, but I couldn't find anything on errors.