https://community.developer.cybersource.com/t5/Integration-and-Testing/How-to-actually-test-refunds-in-CyberSource-sandbox-today-REST/m-p/94585#M58502 <P>In sandbox testing:</P><UL><LI>Successful payment and capture using POST /pts/v2/payments</LI></UL><P>Always get: 404 Not Found "Transaction not found"</P><P>payment_ id is correct (no typos, copied directly), using sandbox keys and test rest merchant. Refund within seconds of capture.</P><P>Is this endpoint still unsupported in sandbox, or missing a config/flag? Need to demo full flow today.</P><P>Thanks!</P> Mon, 24 Nov 2025 12:07:20 GMT avalynn 2025-11-24T12:07:20Z https://community.developer.cybersource.com/t5/Integration-and-Testing/How-to-actually-test-refunds-in-CyberSource-sandbox-today-REST/m-p/94585#M58502 <P>In sandbox testing:</P><UL><LI>Successful payment and capture using POST /pts/v2/payments</LI></UL><P>Always get: 404 Not Found "Transaction not found"</P><P>payment_ id is correct (no typos, copied directly), using sandbox keys and test rest merchant. Refund within seconds of capture.</P><P>Is this endpoint still unsupported in sandbox, or missing a config/flag? Need to demo full flow today.</P><P>Thanks!</P> Mon, 24 Nov 2025 12:07:20 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/How-to-actually-test-refunds-in-CyberSource-sandbox-today-REST/m-p/94585#M58502 avalynn 2025-11-24T12:07:20Z