I need disable cash on delivery method restricted for specific zip codes.

I use IWD One Page Checkout for my project


try below for checkout page , All you need is to edit the file /app/code/local/Mage/Payment/Model/Method/Cashondelivery.php

public function getInstructions()
            return trim($this->getConfigData('instructions'));

        public function isAvailable($quote = null)
        if ($quote) {

            // Here is the list of restricted Zip Codes
            $restrictedZips = array(


            $address = $quote->isVirtual() ? $quote->getBillingAddress() : $quote->getShippingAddress();
            $customerZip = $address->getPostcode();

            if (!in_array($customerZip, $restrictedZips)) {
                return false;

        return parent::isAvailable($quote);

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