seitime-frappe/frappe/docs/user/guides/reports-and-printing/getting-information-from-another-document-in-print-format.md

In a print format, you can get data from another document. For example in if you have a fields called sales_order in Sales Invoice, then you can get the sales order details using frappe.get_doc:

{% raw %} {% set sales_order_doc = frappe.get_doc("Sales Order", sales_order) %}

{{ sales_order_doc.customer }}

{% endraw %}