Hi, I work as a staff accountant for a private accounting company. I didn't really do anything to "convince" them. I actually just had a meeting with my HR rep and talked to her about my situation. I just asked her if it would be possible for her to assist me by filling out the form and paying the fee on my behalf (I told them I would reimburse the company back for the fee). Luckily, my HR rep allowed it and completed it very quickly!
It doesn't hurt to try so if you are in the same boat I suggest you just schedule a meeting with your HR person or boss.