Mews experienced a major incident on January 20, 2026 affecting Mews Operations, lasting 3h 47m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jan 20, 2026, 10:31 PM UTC
We're experiencing errors/delay to print Bills in Germany for customers using fiscalization integration.
- resolved Jan 21, 2026, 02:19 AM UTC
The issue has been resolved. Fiscalization of pending invoices has completed successfully, and the system is operating normally.
- postmortem Feb 02, 2026, 12:22 PM UTC
## Problem Properties in Germany using the fiscalization integration were unable to print bills between January 20, 2026 \(13:18 UTC\) and January 21, 2026 \(02:03 UTC\). The fiscal signing process required for German tax compliance was not completing during bill closure. A related incident occurred on January 26, 2026, affecting properties in Germany and France for approximately one hour \(14:01 - 14:55 UTC\). Invoice previews displayed a "waiting for fiscal registry confirmation" message and PDF generation was delayed. ## Causes A database performance issue caused the system to time out when processing German fiscal records. The database query optimizer selected an inefficient execution path, which prevented fiscal records from being processed in a timely manner. This was an infrastructure-level issue unrelated to any software release or scheduled maintenance. The January 26 incident had the same root cause: outdated database index statistics caused the query optimizer to select an inefficient execution path. ## Action Our engineering team identified the database performance issue and restored optimal query performance. All pending fiscal records were processed successfully and no data was lost. The service was fully restored on January 21, 2026, at 02:03 UTC. For the January 26 incident, the team applied a similar fix and confirmed resolution by 14:55 UTC. All affected records were processed successfully. ## Solutions We are implementing the following measures to prevent recurrence: Enhanced monitoring and alerting for fiscalization processing performance Database query optimizations to improve resilience Infrastructure improvements to ensure consistent query performance We apologize for any inconvenience this disruption may have caused. Please contact our support team if you have any questions.