Actually, you need to notify your employer immediately of any changes in your domestic partnership status. Once you terminate your domestic partnership, this person is no longer eligible to be included on your Small Business policy. The same holds true for a spouse who loses eligibility due to divorce. If your employer has been paying a portion of your domestic partners insurance premium, they can hold you liable for reimbursing their share of the premium payment, back to the date when you terminated your partnership. And, in the event of a major claim, the insurance company may even elect to deny payment based on the fact that this person is not eligible to be covered under your policy. How long ago did you terminate this domestic partnership? Also, what state do you live in and how many employees work for your company?