Can I overdraw my account?

Your account can remain negative up to a certain amount which is automatically assigned and cannot be changed manually.
Remember that you have other financing alternatives. Check the available balance in your Sabadell Credit Line from the "Loans and Mortgages" section and, where it says "Up to €5,000 straight into to your account", click on "Use money". You can also apply for a consumer loan by going to "Loans and mortgages" > Pre-approved loans from the side menu, or apply for a credit card, from the Cards section, by scrolling to the bottom and clicking on "Apply for your new card online".