Frequently Asked Questions (FAQ)

What if the check amount provided by the Invoice Payment Status Inquiry (IPSI) screen is less than the amount of the invoice I submitted for payment?

If your invoice is short-paid please refer to the correspondence that was mailed with your check for an explanation. The short payment may be a result of invoice unit prices that were higher than the purchase order, freight charges that were not part of the purchase order, or more items being invoiced then were ordered. It may also be that not all items ordered were received. The contact person on the correspondence can assist you with any question you may have concerning the short payment. The individual who ordered the goods or services can help to resolve disagreements between the terms and specifications on the invoice and the purchase order, if you need further assistance please contact the Accounts Payable Section at (626)458-6900 or by e-mail at

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