Lately, I’ve seen many friends on the forums complaining that when they go to deposit a slightly larger amount of cash or transfer money from another country, the bank asks for a Spanish bank’s source of funds ‘proof of funds,’ which is causing a lot of anxiety. I’ve dealt with this several times myself when renewing my residency and buying a property, so today I’m starting this thread to chat with everyone about what this ‘Justificación de Origen de Fondos’ is all about. Hopefully, this can help those in need.
Why do you need to provide proof of funds?
Actually, it’s not the banks trying to give us a hard time. It’s mainly to comply with the anti-money laundering regulations of Spain and the entire European Union. As financial institutions, banks are obligated to monitor large or suspicious fund movements in accounts. To put it simply, they need to confirm that your money comes from legitimate sources and wasn’t obtained through illegal means. Therefore, whether you’re making the first deposit into a new account or a large sum suddenly appears in an old one, it could trigger the bank’s review mechanism.

What situations are likely to require proof?
Based on my experience and conversations with bank managers, the following situations are common triggers:
- Depositing a large amount of cash at once.
- Frequent cash deposits in a short period, even if the individual amounts are small.
- Receiving a large transfer from a country outside the EU.
- Your account activity is significantly inconsistent with the profession or income level you previously declared.
- Receiving large funds intended for investment or property purchase.
How to prepare the supporting documents?
Here comes the most crucial step. The core principle for the documentation is: make the origin and flow of your money clear and traceable. You need to provide official documents corresponding to where your money came from. Don’t make assumptions or provide self-made ‘proof’ that isn’t clear or verifiable. I’ve put together a simple table listing common source of funds and their corresponding supporting documents for your reference:
| Source of Funds | Recommended Supporting Documents |
| Salary Income | Bank-stamped payslips, personal income tax return (IRPF) |
| Proceeds from Property Sale | Property purchase and sale agreement, notarized documents of the transaction |
| Gift from Family | Proof of kinship, gift agreement, proof of gift tax payment |
| Company Dividends/Shares | Company financial reports, shareholder resolutions, proof of dividend payment |
| International Transfers | Transfer receipts from the originating bank, proof of income from abroad |
Finally, a few reminders: The bank will require you to provide an official sworn translation for all non-Spanish documents. Also, don’t try your luck. If the bank sends you a notice requesting documents, be sure to cooperate within the specified deadline. Otherwise, the most direct consequence is that your account will be frozen, which would be a huge problem. Has anyone else encountered a similar situation? Feel free to share how you resolved it!