Having JUST gone through the process of being approved for self-study CEH examination, I know exactly what you mean. Here is the deal:
1. Go Here and fill it out:
https://cert.eccouncil.org/Exam-Eligibility-Form2. Someone will email you with the forms needed. Sign and
fax them in, including the $100 billing form. Be sure to write your supervisor's contact info somewhere because there is no place for it. (Conflicting forms, I know).
3. They will email your supervisor with a PDF for him to fill out and
fax in to them. Within 1 week, ask your supervisor if he's gotten this form. If not, email either "applicationservices[at]eccouncil[dot]org" or the person who contacted you, if they emailed you from their own address.
4. Within 2-3 weeks, follow up with same email addresses mentioned above and ask them if they have everything needed for testing approval processing.
5. Once they approve you via email, you will have to fill out the same "billing" form again for the $500 VUE voucher purchase.
6. Within 3-5 business days, you will receive your voucher number via email, along with your EC Council approval number that authorizes you to take the test.
7. Currently, I'm scheduling my test date now, hopefully for next week!
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It took me forever to get all of this done and I've complained to them in great detail about their lack of uniformity on the website with conflicting documents and link redirects that really detracts from the expected professionalism. Pain in the butt, and I'm really hoping that submitting my ECE's every year isn't equally painful.