mr_pablo

[bright talon]

Your server-side endpoint could catch the error, so it would be a matter of surfacing an error to your customer (and maybe asking them to input a new code) or of creating a Checkout Session without the code and sending the user to there though failing silently like that may confuse some users

[harsh berry]

OK, I havent taken a look at the checkout code in some time (written by previous devs) so I'll see what we can do in that regard