Do you have a DUNS number? July 22, 2020 19:07 Updated Follow OffSec Services Limited is organized under the laws of Gibraltar. Our DUNS number is 56-556-8585. Related articles Am I able to switch payment methods after the purchase is complete? Do you offer installments or payment plans? What types of payments do you accept? Can I use my phone during the exam? How can I pay for vouchers?