I am putting together a survey where respondents will get a redeem code for a free drink upon submitting the survey. I want Qualtrics to get the one-time only code from a predefined list of codes in order to ensure the person did indeed complete the survey (so a person can't write in any code and get a free drink or use the same code over and over).
I came across the Rand function, but that does not use a pre-existing list, just a range of numbers that you set. Also, I am concerned it might generate the same number over time. Anyone know how to do this? Thanks in advance for your help!
Best answer by KoalaTricks
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