The IATA not working doesn't mean the agency is not registered, it could mean any of these:The agency is not registered;The agency did not enter the IATA when they registered;The number that you have entered does not match what was provided by the Host;There are duplicates accounts with the same IATA so we prevent registration via this route.For 2. - 4., an alternate way to register is by using your agency's Viator Host ID (e.g. P12345678).If you need further assistance, please reach out to us via the Contact Us form. Please make sure you select "Travel Advisor" as account type and "Registration issues" as reason for contact. So that we can quickly locate your agency's Viator Host ID, please enter the follow details in the text of your inquiry:- Your full name;- Your email address;- Your IATA/CLIA code (alternatively, please enter other agency credential);- Your Company Name;- Your Company Billing Address.Once the inquiry is submitted, a Travel Agent Program team member will reach out within 24 business hours to assist (M-F, 6:30 am to 3:00 pm PDT).Alternatively, if you prefer to speak with us, you can ring our Travel Agent Program Sales Team at 866-654-1438