<?php include_once '../../lib/phpWeFact/WeFact_Api.php'; include_once '../../lib/phpWeFact/WeFact_Model.php'; include_once '../../lib/phpWeFact/WeFact_CreditInvoice.php'; include_once '../../lib/phpWeFact/WeFact_CreditInvoiceLine.php'; $creditInvoice = WeFact_CreditInvoice::getByCode("CF0009"); $creditInvoice->setAmountPaid(50); $result = $creditInvoice->partPayment(); var_dump($result);