One way to get around the parent sending them for the two weeks is to remind them that the security deposit was to cover the situation of them not starting care at all and non=refundable. But, if they start care then they would pay for the first week of care as normal on the drop off day and she is free to give me written notice that day if she wishes and mine is 3 weeks notice. The deposit would apply to the last two weeks of care so she would have to pay for at least one more week of care if she wanted to start them in order to use her two weeks deposit.