To delete a triggered send definition, use the sample code below as a model for creating your own API request. Marketing Cloud Engagement changes the external key and name of a triggered send definition after it is deleted. This change allows you to reuse deleted names and external keys for new triggered send definitions.
note: API requests that refer to a deleted triggered send definition always result in failure.
Sample SOAP Envelope
<s:Envelope
xmlns:s="http://www.w3.org/2003/05/soap-envelope"
xmlns:a="http://schemas.xmlsoap.org/ws/2004/08/addressing"
xmlns:u="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
<s:Header>
<o:Security
s:mustUnderstand="1"
xmlns:o="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
<o:UsernameToken u:Id="uuid-c10e3bda-13ef-4868-bacd-6e760cd45cf2-1">
<o:Username>${#Project#S1:113903:UN}</o:Username>
<o:Password>${#Project#S1:113903:PW}</o:Password>
</o:UsernameToken>
</o:Security>
</s:Header>
<s:Body
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<DeleteRequest xmlns="http://exacttarget.com/wsdl/partnerAPI">
<Options />
<Objects xsi:type="TriggeredSendDefinition">
<PartnerKey xsi:nil="true" />
<ObjectID xsi:nil="true" />
<CustomerKey>ExampleTSDDelete</CustomerKey>
</Objects>
</DeleteRequest>
</s:Body>
</s:Envelope>