Hey IG Support!
I was in the process of opening a US Options & futures account, I had applied for it, but still had to do the quiz and upload my id. When I tried to add funds to my spread betting account, but got a message saying that I had to re-upload my ID.
This made me expedite the application for the US Options account, good thing in the end. After I finished the onboarding on that account, I was able to add funds again to the SB account.
Raising this as it might create an extra stressful situation if it would've happened during a margin call.
TA