> ## Documentation Index > Fetch the complete documentation index at: https://docs.feedbackflowhq.com/llms.txt > Use this file to discover all available pages before exploring further. # Single Use Links > Make sure that each respondent only replies once with single use links. This guide will help you understand how to generate and use single-use links within our application. ## Purpose * Single-use links (or one-time / disposable links) are URLs that grant access to a survey only once. * The primary purpose of single-use links is to assure that no respondent submits a survey twice. ## Using Single-Use Links with Feedbackflow Using single-use links with Feedbackflow is quite straight-forward: 1. In the survey settings, toggle "Single Use Link" on: Single use survey settings 2. When you publish your survey, the following modal will open: Share modal with 7 single use links which can be regenerated Here, you can copy and generate as many single-use links as you need. ## Check suId of a submission You can find the suId of each submission in the submission meta data. To view it, simple hover over the Avatar: View suId in the submission meta data. ### 'Link used' message You can customize the 'link used' messaging in the Survey Editor settings: Adjust the message shown to people if a link was already used.