When "Create Samples" is selected on the About Payments2Us Tab, this creates a "DEMO FACILITY" in the Merchant Facility Tab.
The "DEMO FACILITY" has a value assigned to the field "Print Email Receipt".
The "Print Email Receipt" receipt field is used when a Payment Txn or Contact does not have an email address.
When a Merchant Facility has the "Print Email Receipt" added or updated, this triggers off a process of assign this value the field "Print Email Receipt" on all Contacts that do NOT have an existing email address. This is so workflows have an email address to use when needed.
During the update of contacts, the processor may have error messages. These are what are being logged.