CUNA and NAFCU have made the same requests to the CFPB. It's unclear if or when the automated calls could begin.

CUNA Mutual forecasts a 25% peak this summer, falling to 15% by the year's end.

The organization's idea is to help credit unions attract more credit cardholders and higher conversion rates.

Dolphin Debit currently services more than 1,900 ATMs for hundreds of banks and credit unions in the U.S.