A system completes a form with plausible but unavailable information. I propose to leave the field to be verified and indicate the necessary data.
In the example, an invented address would make the document formally complete but substantially wrong. Graphical completeness does not justify fabrication.
A professional process must distinguish absence, hypothesis and verified information. The possibility of stopping in front of a missing element is part of the control, especially when the document will be used by others to make decisions.