Each submission can have a unique reference ID that can be enable in the Settings – Notifications – Form Owner Options section. After submission, you can redirect users to a URL that contains this ID.Paste the URL below in the Settings – Thank you Page – Redirect to a web page box and make the indicated adjustments.
a) http://www.yoursite.com/file.php – Replace this with your custom page.
b) yourrefid – Here, you can use any variable you want (ABC, Order Number, anything). The variable can be different from the one you have put in the Reference ID box, in Notifications.
c) =requestRefID – This part should be left exactly as it is.
Below you have an example with our domain:
https://salesforce.123formbuilder.com/file.php?OrderNumber=requestRefID – this is placed in the Thank You Page section.
In your browser, after submitting the PHP form, the Redirect URL will look like this: https://salesforce.123formbuilder.com/file.php?OrderNumber=1563453426