How to properly implement conditional redirects?

Good suggestion. I also made a dedicated page to serve as a waystation for redirects that need to ultimately land the user on a page that requires data to be sent. I even implemented an option set to drive custom messaging via URL parameters on the new page in case it lingers due to network lag or the user simply interrupts the redirect away from there to the final destination. As @vnihoul77 explained in another thread, using static values in Data to send and URL parameters doesn’t shift the redirect to client-side, but keeps it server-side as a 302.

Considered using instead the standard 404 page for this purpose; only reason I didn’t is that that page’s URL must be …/404, which seems messy for errors that are not “404 not found” but rather, for example, “403 forbidden”.