The employer should keep records of the distribution, method of delivery, date of delivery, and any refusals to sign the form. An employee who receives the employee notice but refuses to sign the acknowledgment form is subject to network requirements, unless the employee has pre-designated his/her HMO treating doctor. Pre-designation must be done directly with the network prior to injury. An injured employee who seeks care outside the network and has not pre-designated his/her HMO treating doctor, may be financially responsible for his/her medical costs.