[Air-L] Question about reimbursing participants doing electronic surveys?

Hi, I'm designing a set of web surveys for research purposes to assess mental health literacy. I will submit my protocol through IRB, and subjects will be protected and de-identified. The question I have is with respect to compensation. Participants will have a verify code, and I wanted to compensate them with an electronic gift card after completion of the surveys. My idea was to call the participant to confirm the verify code, and after verification forward them the gift card. I wanted to know if this protocol seemed suitable, or what protocols are there for compensating participants after completion of an online survey? If you have any insight into this issue, I would appreciate it. Thanks, Christian Reusche