Contact rules allow you to assign default behavior for certain fields of the documents coming from repeating suppliers. Please note that contact rules will overwrite any information extracted from the document.

You can use Supplier Rules or Customer Rules to assign a default:

You can also put suppliers on Auto-publish, which means that documents will be automatically published to Accounting software when they come into Apron.
Read more on auto-publishing here.
Whenever Apron has managed to extract all necessary information and the document is not deemed to be a duplicate. Currently Apron does not filter out supplier statements, so if you receive such documents from a given supplier we recommend not setting them to Auto-publish

You can set up Contact rules by clicking 'Set contact rules' on the Document review screen. Alternatively, you can access it via the 'Contacts' section, select a contact and go to the Contact rules tab.