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Hello.
Is the "Unsubscribe" event recorded in the CloudTrail event history?
If the event is recorded, I think you can identify who unsubscribe it.
If you are unsubscribing by clicking on the URL, it will not be recorded in CloudTrail, but if you are unsubscribing from the management console or AWS API, I think the event will be recorded in CloudTrail.
So, if the event is recorded in CloudTrail, you can check whether there is something configured in AWS that automatically cancels the subscription.
Also, did you accidentally click on the unsubscribe URL?
https://docs.aws.amazon.com/sns/latest/dg/sns-logging-using-cloudtrail.html
It appears GMail was automatically unsubscribing me. I followed this post to manually confirm the subscription in the console and the subscription has not been deleted: https://repost.aws/knowledge-center/prevent-unsubscribe-all-sns-topic
answered 2 years ago
I encountered a similar issue where Gmail automatically unsubscribed any email address I added to the SNS topic subscription from the SNS console.
To fix this, you need to manually verify the subscription instead of using the verification link in the email. Here’s how you can do it:
- Copy the subscription verification URL from the email you received.
- Open the SNS Subscriptions section in the AWS Management Console.
- Select the pending email subscription by clicking its radio button.
- Choose Confirm Subscription, then paste the copied URL.
- Click Submit to complete the verification.
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asked 3 years ago
asked 3 years ago
- AWS OFFICIALUpdated 3 years ago

Hi Riku, I'm not unsubscribing. There's no cloudtrail event. I can repeat this problem over and over, delete the subscription and add again, every time the subscription gets automatically deleted without me doing anything.
Is my personal email, so it's not someone else unsubscribing.