Thanks for the reply. I had not thought about the difference between "capturing" and "settling" of transactions. I guess I thought "capture" meant the transaction would be then "settled" rather automatically.

The reason I do not do authorize and capture is that my supplier's products tend to go out of stock. A second reason is that sometimes for a small item that is in a category that is shipped by UPS, they ship USPS for a more reasonable shipping charge, so a refund of shipping charges is needed. Therefore, I have my payment AIM Authorize.net module set to authorize only.

I seem to lack understanding what is going on in the Zen Cart Admin for Payments, Orders.

If a product is completely out of stock, do I need to issue a refund from the cart, since the payment has not been captured?

If I go to Authorize.net and search for unsettled transactions, and press capture, then I can just enter the amount to capture and only that amount is "settled." So that would be the same as a refund.

I was thinking I could "refund" shipping overcharges, and then capture the correct amount, in the Zen Cart payment order admin. But I am now seeing that, if the payment has not been captured, no refund is needed.

I thought I would try the process from the Admin Payments Order screen, but it appears those Zen Cart procedures do not really do anything as far as Authorize.net capture and settling of unsettled transactions.

So, what is the purpose of "capturing" a transaction in Zen Cart only? Does it do anything at all? Is there somewhere in the Zen Cart that the capture is recorded, and is it just an accounting purpose that is achieved, with no connection to the act of capturing and settling a transaction in Authorize.net?

Does one need to do captures or refunds or voids both in Admin and from the Authorize.net website?

No doubt this has been explained somewhere, but so far I have been unable to find information on these questions.

Notageek