assign file name to invoice batches

It would be great to be able to (auto)assign file names when printing batches of invoices (eg the fiel name is the Card ID)

Current using the following process the file name is left blank

https://www.myob.com/nz/support/myob-business/business-settings/forms/sending-forms-in-a-batch?productview=Browser

If the CARD ID could be assigned to each pdf generated in each batch this would greatly improve the ability to save to folder across multiple invoices