Meier let me not wear a mask as I have my CVS card proving I had shots. There was another woman who did not have a mask and my daughter knew her and she had no shot! What is sense of having someone like that doing the wrong unhealthy choice and being able to get in when I had two? You should request proof! Otherwise, have rules you have to have proof one way or the other? User's recommendation: Have proof for your own sake as well as other customers.