Before adding a referee, please follow these steps to double check their email address is correct:
Ask the referee to send you an email from the email address
Send an email to the referee's email address to check if it bounces
Speak to the referee directly to confirm that there are no typo's in the email address
if it's a company email address, check if the email is listed on the company's website
If you continue to experience issues, please contact us here