Safari JavaScript Console to the Rescue

I was trying to submit an online order for a Christmas Gift this morning. Everything went well, till I clicked on the button to place the Order. The screen would take me back to the Payment Section without any Error or Warning(s). I checked the card couple times, but everything was in order.

Out of curiosity, I right clicked on the page, Inspect Element (Safari). Clicked on the Consol Tab. Cleared the logs to reduce clutter and clicked the Submit Order button. and I noticed a line with an Error. One thing that caught my attention was the word City Error.

Went back to Edit the address and I saw a warning asking to me to type the City. The City was already populated as I have been using this card for many years. Provided the city again and surprisingly the city now changed to 13 characters (I live in a city with a long name). It looks like the Developers included USPS validation, but failed to provide the customer with the validation error.

Anyways, thanks to developer tools. Order submitted successfully.