Metadata on customer is useful for storing additional structured information on an object to provide more context.For example, you could store a customer’s full name and unique identifier from your system on a Customer object by defining a key-value pair. A key cannot exist without its corresponding value, and vice versa.
To display customer metadata on invoices, you can switch on the option in the customer creation/edition drawer or set display_in_invoice to true. Once this option is activated, metadata will be displayed on all new finalized and downloaded invoices.
When the customer’s metadata is added/edited/removed, the change only applies to new PDF files. Existing documents are not affected.