Write to us
Email support@withbuttercup.com from the address on your account, with what you were doing and what you saw. Never send a password, a full account number or a code from your authenticator app; nobody at Buttercup will ever ask for one.
Help in your account
Once you are signed in, Help answers common questions and sends a note to support from there, with a way for us to reply to you.
A bank that asks you to sign in again
Banks connect through Plaid. When one asks you to sign in again, reconnect it from Accounts; what arrived before stays.
Deleting your account
From Settings, Your data on the website, or from Overview in the app. The account is read-only that day and deleted after 14 days; until then you can keep it.
A security concern
Write to security@withbuttercup.com. The Security page says how reports are handled.