1. You've exceeded the sending limit
Each bank sets a maximum amount per transaction and a maximum number of transactions per month. If you've gotten close to that limit, Bizum will reject the transaction with an error message. Check your specific limits in the Bizum section of your bank's app.
2. The number isn't registered with Bizum
To send or receive money, both parties need to have the service activated with the correct phone number. Ask the other person to confirm their exact number: it's sometimes mixed up with a different number saved in your contacts.
3. Update your bank's app
Bizum works built into each bank's app, not as a standalone app. If your app is outdated, it may show errors when processing the payment. Go to Google Play or the App Store and check for any pending updates.
4. Connection issues
Since it's a real-time transaction, you need a stable connection. If you're in an area with poor coverage, switch from wifi to mobile data (or vice versa) and try the transaction again.
5. Temporary service overload
During high-usage periods (for example, end of month or events with lots of payments between individuals), Bizum can get temporarily overloaded. If the error persists for no clear reason, wait a few minutes and try again.
6. When to contact your bank
If you've checked everything above and the error continues, or if the money has left your account but the other person hasn't received it, contact your bank's customer service directly: they can see the exact status of the transaction.