Introduction 

On 20th November between 11:50 and 12:30 CET Tink experienced a technical issue which impacted AIS and PIS products in all markets. During the time of the incident, end-users were experiencing issues with initiating payments, fetching transactions, performing account and balance checks, and generating risk reports. 

Root Cause Analysis 

After a thorough investigation, it was found that the issue was triggered by a change which resulted in an impact on the service's stability which in turn degraded the performance of our AIS and PIS offerings. 

Remediation 

Once the issue was identified, the change was immediately rolled back. This brought the affected service back to normal operation. 

Follow-up actions 

To prevent similar issues in the future, Tink will be implementing the following actions: 

1. Enhance the code review and internal testing process for the service in scope of the change. 
2. Exposing changes to a smaller share of production traffic and gradually increasing the volume, allowing for a swifter rollback before issues become highly impacting.