> ## Documentation Index > Fetch the complete documentation index at: https://docs.guito.pt/llms.txt > Use this file to discover all available pages before exploring further. # Bank synchronization > Set up automatic open-banking sync, manage connections, and renew an expired authorization. Once you connect your bank, guito keeps your accounts and transactions up to date on its own, through open banking. This guide shows you how to set up automatic sync, manage your connections, and renew an authorisation when it expires. Access is always read-only. guito reads your account balances, your transaction history, and the account holder name and IBAN, but can never move money or touch your funds. You authorize access in your own bank's portal, with your usual credentials, which guito never sees or stores. ## Set up automatic sync Connect an account through open banking and guito fetches your transactions directly from the bank, then keeps them up to date with no action from you. For the connection step by step, see [Connect your bank](/en/getting-started/connect-your-bank). Once an account is connected: * Transactions sync automatically. * Each transaction arrives already named, categorized, and matched to a merchant. * Each account's balance tracks what the bank records on your statement. You don't have to clean up after the bank. If the same transaction arrives more than once (banks sometimes mirror or re-send an operation as they add detail), guito keeps a single row and updates it in place. Genuine repeat purchases, such as two identical top-ups on the same day, stay as distinct transactions. Each transaction is dated by its booking date, the day the bank recorded it; a separate value date, when the bank sends one, is shown for reference only and never feeds into balances or totals. For how those dates drive your balances, see [how balances work](/en/concepts/how-balances-work). ## Manage connections The **Connections** page gathers all your automatic connections in one place, with the status of each. Go to **Connections** in the sidebar (the **Tools** section). Each row shows the status of the connection. An active connection syncs normally; a connection that needs attention is flagged. From here you can renew an expired connection or reconnect a connection that has an error. ### Renew the authorization By open-banking rules, the authorization you give guito to read your accounts expires periodically (typically every 90 days, though some banks allow longer) and needs to be renewed. When that happens, the account shows a red indicator. On the **Connections** page, the expired connection appears in red. Click **Reconnect**. You go through your bank's portal again to authorize access, just like the first connection. Renewing the authorization does not erase your history. Transactions already synced remain, and automatic sync resumes as soon as the connection is renewed. ## Related pages The first open-banking connection, step by step. How guito calculates and presents your account balances. How guito identifies and handles transfers between your accounts.