Hey everyone.  We've been using auth.net for some years now and overall its worked out pretty darned well for us.  Lately, we are seeing an uptick in the number of failures when we try to issue credits for cancelled orders.  We get the error message "The referenced transaction does not meet the criteria for issuing a credit", and our understanding has been that a charge must have been settled for 24 hours before a credit may be issued.  However, these messages are now taking place at 25 or even 26 hours after settlement.  Is there a rule change that took place recently, or some other policy change, that we should be aware that might also cause this message, or is it simply that the aforementioned 24 hours is an average time after settlement and may be longer for some charges?

Thansk!