The Bank of Spain (BdE) has identified payment fraud as the primary risk to consumer protection in the financial sector, as digital payment methods continue to displace traditional offline transactions. According to the institution’s latest annual report on complaints, grievances related to payment fraud and security have surged, signaling a shift in the primary challenges facing Spanish banking customers.
Fraud Dominates Consumer Complaints
The shift toward digital finance has created new avenues for sophisticated financial scams. Data from the Bank of Spain shows that fraud-related issues now represent the most significant category of concern for users. This trend is reflected in the volume of inquiries and formal complaints submitted to the supervisor. The decline in total volume is largely attributed to the normalization of activity following a period dominated by litigation over mortgage-related expenses.
Why Most Complaints Are Not Admitted
Despite the high volume of reports, the Bank of Spain admitted only 35,1% of complaints for formal processing in the most recent reporting cycle. The institution noted that many submissions failed to meet the necessary criteria, either because the customer had not first exhausted the internal dispute resolution process at their respective bank or because the issue fell outside the supervisor’s legal jurisdiction. Of the cases that were fully processed, only 7.271 resulted in a formal reasoned report. The resolution breakdown shows that banks were found in the right in nearly four out of every ten cases, while roughly 20% of findings favored the consumer. In 33% of instances, the parties reached a mutual settlement, resulting in a total of millions of euros in payouts from financial institutions to users.

Ranking Banks by Dispute Volume
The distribution of complaints varies significantly across Spain’s major financial institutions. CaixaBank recorded the highest number of formal complaints with 6.156, followed by BBVA with 5.700 and Banco Santander with 4.229. Other institutions with significant complaint counts included ING (1.853), Banco Sabadell (1.651), and Bankinter (1.442). At the lower end of the spectrum, specialized or smaller entities such as Solventia, Banca March, and Andbank recorded the fewest formal disputes.

Primary Categories of Financial Disputes
The nature of consumer disputes has evolved, with three main areas accounting for 80% of all demands filed with the Bank of Spain:
- Payment Cards: This category is now the most contested, driven by fraudulent transactions and disputes regarding "revolving" credit cards, specifically concerning documentation and transparency.
- Accounts and Transfers: These account for 29% of complaints. Disputes here focus on unauthorized or fraudulent transfers and dissatisfaction with applied fees and service charges.
- Mortgage Loans: Once the leading source of complaints for two consecutive years, mortgage-related disputes fell by 80%.
While mortgage complaints have plummeted, the Bank of Spain highlighted a 44% year-over-year increase in disputes regarding personal loans. These cases typically involve requests for documentation, disagreements over outstanding debt balances, and issues regarding the formal cancellation of loans.