For example: If an Invoice does not print the Customer Name in the printed PDF, then:
1. Navigate to the Customer record > Address tab make sure the Addressee field is populated, then Save.
2. Once done, go back to the Transaction record, go to the Billing and Shipping tab, locate the Address as this is where the data is being pulled from. The Customer Name should appear. If this is the case, proceed in printing the Transaction and the Customer Name will then be populated accordingly.