The duplicate transaction message is a safety feature, created by your credit card company, to prevent duplicate charges. This duplicate transaction message is sent to you when a purchase is from the same retailer/vendor for the same or similar amount (i.e., exam appointments that cost the same).
To eliminate this issue, separate payments by 1 to 2 hours or use a different credit card.
If you continue to experience payment issues then please contact the webcam proctor (ProctorU) directly by calling 855-772-8678 or 925-273-7588. Select Option 2 (Advocates) or Option 3 (Assessment Services). To speak to an agent, please call between 8:00 a.m. and 8:00 p.m. (EST), seven days a week.