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TOPIC: How can I identify participants by name, phone number, or other ID

How can I identify participants by name, phone number, or other ID 3 years 2 months ago #97388

Im currently using version 1.92
i had create a simple survey with 10 question and at the final page, it require participant to fill up some personal details.
im wondering how can i add validation to prevent repeated participants by name, phone number and ID ?
any advice will be much appreciated.
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