https://community.developer.cybersource.com/t5/Integration-and-Testing/Is-it-possible-to-reject-transactions-not-supplying-a-value-for/m-p/49884#M25413 <P>Might be a way.</P><P>Login to your merchant account</P><P>under settings - payment form - form fields - make the "PO Number" as required.</P> Wed, 04 Mar 2015 20:47:24 GMT RaynorC1emen7 2015-03-04T20:47:24Z https://community.developer.cybersource.com/t5/Integration-and-Testing/Is-it-possible-to-reject-transactions-not-supplying-a-value-for/m-p/49880#M25409 <P>I'm curious to find out if it's possible to reject any payment transactions via AIM that do not supply a value for x_po_num. &nbsp;My company works with many 3rd party&nbsp;SaaS providers that use our authorize.net account to capture CC payments on websites they develop. &nbsp;We use the x_po_num field to store a unique internal identified so we know what the transaction is for and how to code it in our accounting system. &nbsp;From time to time a merchant will forget to send this and that causes havoc with our internal processes. &nbsp;Therefore, I'm wondering if we can cause authorize.net to reject any transaction which is missing a value for that field.</P> Wed, 04 Mar 2015 19:10:35 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/Is-it-possible-to-reject-transactions-not-supplying-a-value-for/m-p/49880#M25409 FredWeston 2015-03-04T19:10:35Z https://community.developer.cybersource.com/t5/Integration-and-Testing/Is-it-possible-to-reject-transactions-not-supplying-a-value-for/m-p/49884#M25413 <P>Might be a way.</P><P>Login to your merchant account</P><P>under settings - payment form - form fields - make the "PO Number" as required.</P> Wed, 04 Mar 2015 20:47:24 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/Is-it-possible-to-reject-transactions-not-supplying-a-value-for/m-p/49884#M25413 RaynorC1emen7 2015-03-04T20:47:24Z