No. You can't send certified mail to international addresses. Certified mail is a domestic mail product.
You can send registered mail to international addresses, but Click2Mail doesn't offer this service. For more information, contact your local USPS or 1-800-ASK-USPS.
If you have any questions about using Click2Mail, please contact Customer Support at 866-665-2787 or firstname.lastname@example.org. Our hours of operation are Monday - Friday, 9 AM to 8 PM Eastern.