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Hello,
On November 21, 2025, Amazon Simple Storage Service (Amazon S3) will stop returning Owner.DisplayName for all request responses. Owner.DisplayName is a legacy field that most modern applications do not rely on as it has been superseded by AWS Account IDs and IAM ARNs. Until November 21, 2025, S3 will progressively remove this field from request responses. After this date, Owner.DisplayName will not be returned for any requests made to Amazon S3.
The Owner.DisplayName parameter is supported only in eight AWS Regions on the Amazon S3 APIs listed below under recommended actions. If you have applications that rely on this behavior to validate ownership of objects, we recommend using canonical IDs (unique identifier for AWS accounts), AWS account ID (12 digit identifier) or IAM ARNs (full resource naming) as a direct replacement of Owner.DisplayName.
This change affects the following AWS Regions: US-EAST-1 Region, US-WEST-1 Region, US-WEST-2 Region, AP-SOUTHEAST-1 Region, AP-SOUTHEAST-2 Region, AP-NORTHEAST-1 Region, EU-WEST-1 Region, and SA-EAST-1 Region.
This is also communicated in S3 documentation [1].
Important Dates:
* From now until November 21, 2025: S3 will gradually stop returning the Owner.DisplayName.
* Beginning November 21, 2025: Owner.DisplayName will not be returned across all requests to Amazon S3 in any AWS region.
Recommended Actions:
1. Review the following APIs that return Owner.DisplayName attribute as part of the response and ensure users completely remove any references:
REST.GET.ACL - GetBucketAcl, GetObjectAcl
REST.GET.BUCKET - ListObjects, ListObjectsV2
REST.GET.BUCKETVERSIONS - ListObjectVersions
REST.GET.LOGGING_STATUS - GetBucketLogging
REST.GET.SERVICE - ListBuckets
REST.GET.UPLOAD - ListParts
REST.GET.UPLOADS - ListMultipartUploads
2. Update applications to use canonical IDs instead of Owner.DisplayName attribute.
3. Implement proper error handling for missing Owner.DisplayName attribute [2]
4. Test applications with Owner.DisplayName attribute removed from responses.
5. Validate owner identification using canonical IDs.
6. Review and update your runbooks and applications that reference Owner.DisplayName attribute.
If you have any questions or concerns, please reach out to AWS Support [3].
[1] https://docs.aws.amazon.com/AmazonS3/latest/API/API_Owner.html
[2] https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html
[3] https://aws.amazon.com/support
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Reference: https://health.aws.amazon.com/health/home?region=us-east-1#/event-log?eventID=arn:aws:health:global::event/S3/AWS_S3_PLANNED_LIFECYCLE_EVENT/AWS_S3_PLANNED_LIFECYCLE_EVENT_a7d6c3f56766a03c30882499f426b78533c4e59854d7d20a84e30a7da4adcd2c&eventTab=details
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