Are AWS S3 Event Notifications guaranteed to be delivered?

Question

I\'m hooking up AWS S3 event notifications to an AWS Lambda processing pipeline.

I can\'t find documentation on S3 event notification guarantees. Can I be sure all

Answer 1

From the Documentation Important Amazon S3 event notifications typically deliver events in seconds but can sometimes take a minute or longer. On very rare occasions, events might be lost.

We are seeing lost events right now. A lot in volume but low by percentage.