AbleCommerce Shopping Cart Software

Is there a way to update the payment "paid" or receive the payment by changing status? We have some payments processed outside AC. Our system updates the status order status to paid and shipment status to shipped, but payment still says unprocessed for these orders.

You need to mark the payments as received from the "/admin/orders/ViewOrder.aspx" page if you are updating manually. It will update the payment status to "Paid". You can do the same from the manage order payments page as well (/Admin/Orders/Payments/Default.aspx).