How to setup payments to Verizon in ACH / CTX format?

We are transitioning our ACH payments to CTX format, and we are trying to accommodate the format requirements for Verizon, which wants every account and / or phone number listed with each payment transmission.

What's the best way to handle this in the vendor setup?

(When we pay by check, we put the account and / or phone number in the paysite name, and at the beginning of the site address, so they show on the paper check. )

Thanks...

Andy Farber

Manager, Financial Systems

Consumer Reports