Originally Posted by
Raffles
No, doesn't impact anything and you can easily make the payment on the Amex website
The website doesn't like you paying more than your previous bill.
If your last monthly bill was £500, even if you have spent £2,000 so far this month, it won't let you pay more than £500, which is a bit of a pain. In the first month, before you have a bill, you can't pay anything at all. You can still send the money via bank transfer though. Not sure if you can make multiple smaller payments as well.