How to know if we use CTX format for our ACH Payments?

Summary:

Hello, we need to find out if we use CTX format for our ACH payments? In our mapping of payment format, i see CTX hardcoded. But I am unsure if that would be enough evidene to say it is CTX format? We have to confirm with client if we use CTX format with files to the bank. What would be the indications that CTX is being used?

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