Use same voucher after canceling exam.

Review the terms and conditions of your voucher. These should include information about validity, expiration, and reuse after cancellation. This information is often available where you initially received the voucher or on the exam provider's website.

AWS provides general information about purchasing and using exam vouchers. They also occasionally offer special extensions on voucher validity under certain conditions https://aws.amazon.com/certification/bulk-voucher/

Xvoucher Help Desk: This platform offers various articles related to AWS exam vouchers, including how to purchase them, their expiration dates, and how to manage them. While it doesn't explicitly mention the policy on reusing vouchers after cancellation, it's a useful resource for related queries https://awshelp.xvoucher.com/hc/en-us/articles/5175178318612-How-to-Purchase-AWS-Certification-Exam-Vouchers

AWS and Xvoucher Websites: Both AWS and Xvoucher have detailed information about purchasing vouchers, testing centers, and other related details. It's recommended to review these sites thoroughly for any specific terms and conditions related to voucher reuse​