I have it in my contract that it will result in immediate termination of contract without notice and without refund of deposit. I do not and should not have to give them a warning as they have signed a contract to acknowledge this policy and if they were not happy with this then it was something to be brought up upon signing the contract. Thats another reason why I have every clause in my contract initialled and I never email my contract. My contract is signed face to face and I read the contract aloud one policy at a time and ask if they understand before they initial each one. I clearly state to people that masking illnesses or bringing their child to daycare knowing they are ill or have been within the last 24 hours is not okay and I clearly and kindly explain why. I have terminated for this reason, and would do again in the future. The parent is an adult and it is not my job to give them chances and parent them when I have been clear from the start on what the policies are. I understand that people miss things in the small print but thats exactly why I am so thorough with going through my contract and at least twice a year in newsletters, especially cold and flu season, I remind people of these particular policies, so they dont have room for excuses. Before I added this condition to my contract I found that in my experience, the parents who do this kind of thing will generally do it again or will break other policies also and if you give them and inch, generally, they will take a mile.