When processing payments to IngramSpark yourself, you will need to log in and enter your payment details at a variety of points.
The most important of these is during title setup.
First, log in to IngramSpark at myaccount.ingramspark.com
When you are in the dashboard, please click the title of your book:
Most books will present some kind of warning that you will need to click through. The typical reasons for this are that some of the images used were of a low resolution, or that the PDF is in color and requires IngramSpark to convert the PDF to the PDFX-1A standard. Neither of these issues will pose a problem with the production of your book, so please check the necessary box and then click "Continue anyway":
Depending on the stage you are at in setup, you may need to click through other parts of the setup process. We will have filled in the necessary information for you, so just click the yellow buttons to proceed until you reach the payment page. Then choose your card on file, enter your CVV, and click "I Agree" to complete the setup process: