'Unlinked Credit' for Authorize.net gives error "Expiration date is required"

[Nilesh Avhad]

Hi,

I am trying to create an 'Unlinked Credit' transaction(for Refund) over Authorize.net in Test mode. Since its an 'Unlinked Credit' I am passing the identification(transaction id) parameter as nil or blank to the Credit call, but it gives this error: Expiration date is required.

However, when I pass some random identification(e.g.: 112322232), I get this message: "The referenced transaction does not meet the criteria for issuing a credit"

How can I get the credit call to work in test mode without transaction id? If it won't work what is the right way to create an 'Unlinked Credit' transaction?

Regards,

Nilesh