Home health aides can take on many forms, and not all home health aides are properly certified. To become certified as a home health aide by the New Jersey Board of Nursing, applicants must complete an approved training course, complete a competency evaluation, pass federal and state criminal background checks and be supervised by a professional registered nurse. Certification must be renewed every two years. Despite this, not all home health aide agencies are vigilant about ensuring that their staff members are properly certified or trained, and many home health aides do not complete these training requirements at all.