I have followed all the steps from this url: http://help.surveygizmo.com/help/article/link/create-a-confirmation-code
Under this specific step: “Next, you can use the merge code for the coupon code hidden value to display the respondent’s coupon code. We set this up on the thank you page in our example.
In the screenshot example, there was a code that says [question(value”), id=”6″]. How do u get this 6? It doesn’t work
The merge code looks to be correct. The only thing that I can think of is if your text on your thank you page is using smart quotes instead of straight quotes. In your question above if you look at the text of your question above, you are missing the ” in front of the value” and also after the 6 the double quote is a smart double quote. If the text is correct on your thank you page (the above text was not a copy and paste but a typo, then I would send a message to the Support Desk.