FOR CSCP 

1. Once you have your voucher, go to www.ascm.org
2. Sign in to "My Account". 
3. Go to "Certifications" 
4. Then "Schedule & Access Certification Exams"
5. Then follow the prompts, selecting  - CSCP 
6. When you get to payments, it should know that you have a voucher. 
7. Review and complete. 
8. Schedule your Exam.