I'm sure thousands of people here have it, check their website. Not sure if the chainsaw forum is the place to ask though.
Taking an ISA Certification Exam
Pursuing an ISA Certification is a worthy goal that will help you advance your career in the arboriculture industry. We encourage you to take a few moments to review the materials in this section. You will learn more about how to prepare for the exam and what is required during the application process.
There are two options available for candidates to sit for their certification exams: paper-based exams offered by a chapter or affiliated organization, or computer-based exams administered at a Pearson VUE testing facility.