Magento Open Source, 2.0.x

Magento 2.0.18 is the final 2.0.x release. After March 2018, Magento 2.0.x will no longer receive security patches, quality fixes, or documentation updates. To maintain your site's performance, security, and PCIPayment Card Industry: Refers to debit and credit cards and their associated businesses. compliance, upgrade to the latest version of Magento.

Adding Reference IDs to Header

The order ID and customer IP address can be included in the header of sales documents that accompany an order. Follow the instructions below to include either, or both of these identifiers for reference in the header of invoices, shipment packing slips, and credit memos.