Electronic Refund being forced as default

I opened an SR with Oracle Support back in January and to date do not have a satisfactory resolution - nor a response in the last 2 weeks.

I hope the Community can help.

AR personell cannot apply Credit Memo transactions because they are getting an
APP-AR-295227: Please define an active receivable activity for electronic refunds before
entering credit memo.

We do not do or use electronic refunds. It is defaulting into the field whre they use to put in an invoice number

We need to remove this from the default values in the Transaction Summary form or at least stop it from being a forced default value.