Wait a minute, aren't FBC's withdrawals processed without any email confirmation, except the notification about the amount withdrawed?
I withdrawed mine several times without any issues, and they're via Instant.
You're right about that. I'm not sure maybe, email confirmation is required when 2FA is enabled.
maybe he tries to withdraw to a non-default withdrawal address, that might require confirmation link
I've done many slow withdrawal to my default address and never need any confirmation