Delta is a column located in the 'Payment Ready' tab and acts as a vital check to highlight instances where the invoice total doesn't match the sum of its line items (or the amount that you will pay to the providers)
-A positive Delta indicates that the invoice total amount is less than the sum of the lines. See below for an example, If you create an ABA for this you will be paying the provider for $150.01 (overpayment of $.01)
-A negative Delta indicates that the invoice total amount is greater than the sum of the lines. See below for an example, If you create an ABA for this you will be paying the provider for only $149.99 (underpayment of $.01)
What to Do : Put the Delta with Invoice on Hold
We suggest to put those Invoices with Delta on hold and see what causes the difference, then from here you can cancel and resubmit again by adjusting it to the correct amount.