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# Preventing multiple confirmation emails on PATCH or PUT to Lists/Member endpoint

It was possible to force multiple confirmation emails to be sent to a member when using identical [PATCH](/developer/marketing/api/lists/update-member) or [PUT](/developer/marketing/api/lists/upsert-member) requests to the [Members resource](/developer/marketing/api/lists/list-members). We’ve corrected this behavior by preventing the duplicate confirmation emails from being sent.

Before this change, multiple confirmation emails would be sent to a member’s inbox, which could potentially be used for abuse.