Verify USA Client information by phone

I am looking for a freelancer to verify client information such as business name and postal address in the USA to send them our client's brochures. To take this project on, I will need you to make phone calls to the respective clients in order to verify their details. We have made a list of 300 clients already who would need to be contacted and verified so that the brochures/posts do not get returned to us for incorrect address. Mandatory experience in calling US clients is required for this job. It's important that each client's details are confirmed by phone only and not referred to from the website since a lot of companies might have moved to a new location. This project would need to be completed in 3 days since the list of companies to be contacted is already with us and will be provided to the right candidate. With your help, I am confident that the client information can be verified with precision and are in safe hands.