I'm in the process of doing this now. You can close accounts from Control Tower without needing to log in as root to each separate account, adding a credit card, removing it from the org, and then closing it manually.
However, you can only close them from Control Tower at the rate of 2 to 3 per month, due to a hard limit quota which cannot be changed, even if you request it. Needless to say, this sucks when you've followed AWS's own best practices and created lots of accounts using Control Tower's "vending machine."
AWS's archaic account model is one reason we've switched to GCP.
However, you can only close them from Control Tower at the rate of 2 to 3 per month, due to a hard limit quota which cannot be changed, even if you request it. Needless to say, this sucks when you've followed AWS's own best practices and created lots of accounts using Control Tower's "vending machine."
AWS's archaic account model is one reason we've switched to GCP.