Changes save when you press Save. Nothing here is billed.
How you appear to customers on invoices and emails.
Also your sign-in. Changing it sends a confirmation to both addresses.
Address, currency and how the storefront is reached.
Existing orders keep the currency they were placed in.
What gets sent to mara@northlight.example.
3 devices signed in — this browser, an iPhone (Berlin), a MacBook (Berlin).
These need a typed confirmation and cannot be undone.