We used to have the same problem. If it is a common occurence the insurance carrier will probably not budge. Ask if you can do a promise to pay letter and get an exception. We had to change our waiting period at renewal to 60 days and start coordinating with payroll to track new employees when the location were not properly notifiying us. Unfortuneately, I have had occasions where i have had to fudge the date of hire and enroll them current and then refund them any deductions (or pay for the medical