Municipality of Deventer leaks BSNs and financial data due to email error
The Municipality of Deventer experienced a data leak due to a human error in sending an email, which was reported around January 30-31, 2025. The incident involved the accidental sending of an email containing citizen service numbers (BSNs), names, dates of birth, and loan/credit data of approximately 800 individuals to an incorrect email address. The data belonged to clients of the Budget Advies Bureau (BAD). The municipality informed the affected clients via letter, apologized for the error, and reported the incident to the Dutch Data Protection Authority. While the chance of risky consequences was deemed small, the municipality is analyzing its work processes and implementing measures to prevent future occurrences.
Signal context
First seen: Jan 27, 2025
Last updated: Jul 1, 2026
Status: Public signal
Key points
- Data leak at Municipality of Deventer due to an email error.
- Reported around January 30-31, 2025.
- BSNs, names, dates of birth, and loan/credit data of approximately 800 individuals exposed.
Signal analysis
BetaThis analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Sector: Finance and Insurance
Likely country: 🇳🇱 Netherlands
inferred from company domain
Watch process controls, misconfiguration and accidental disclosure paths.
- Source type: outside the affected organization
Impact area: Confidentiality
Likely asset: User or customer data
- 23 signals in the same sector
- 88 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
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