i am trying to get a new job. the prospective employer requires that my current supervisor fill out an evaluation form. what should i do when my current employer is refusing to to fill out that evaluation form? i have met all other requirements. but

i am trying to get a new job. the prospective employer requires that my current supervisor fill out an evaluation form. what should i do when my current employer is refusing to to fill out that evaluation form? i have met all other requirements. but my current employer is not cooperating. what can I do?