Putting a user defined validation to check if supplier email remittance is blank in Manage Format

Summary:

We have enabled a H2H connection with SCB bank of ISO payment file format. One of the mandatory fields is the supplier email address for remittance purposes.

Therefore, we want to enable a user-defined validation to check if the supplier email remittance is blank in "Manage Format" setup.

Please kindly advice what attribute that we can use?

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26C

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