I configured Amazon Simple Storage Service (Amazon S3) event notifications with a filter on the object key name, but my event notifications aren't working.
Resolution
Check if you included a wildcard (*) in the prefix or suffix of the key name filter. Because the wildcard asterisk character (*) is a valid character that can be used in object key names, Amazon S3 interprets the asterisk as a prefix or suffix filter.
You can't use the wildcard character to represent multiple characters for the prefix or suffix object key name filter. Instead, you must configure multiple event notifications to match the object key names.
Related information
Working with object metadata