update_refund_check_no_m Guide

The update_refund_check_no_m API updates the refund check number on a refund processed earlier without a check number.

API Specification:	update_refund_check_no_m
Required Fields:	<client_no> <auth_key> <acct_no> or <acct_user_id> or <client_acct_id> <transaction_id> <refund_check_number>