Nacha's rule requiring ODFI to supply authorization documentation

I recommend trying to contact the originator to ask for some evidence of author ization only because it’s another avenue to request it. But if you are unsuccessful, you could contact the ODFI and remind it that it has an obligation under the Nacha Rules to contact the Originator for that evidence, and to forward it to you. Ultimately, your bank could pursue a rules violation complaint against the ODFI.