The situation concerns ephemeral facts, that can't be proven to an department outsider. The sole two authors of an accepted paper have virtually no contribution to the result, but both hold prominent positions of authority within the department and are on top of that have close family ties with each other.
The main theoretical research was done by two computer scientists and the experimental setup & execution by a whole team of software engineers. Both groups are routinely engaged in R&D, but are affiliated with a company, that is owned by the two authors.
These affiliations are nowhere stated in the accepted version of the paper. And there is no chance that anyone will publicly come forward for fear of retribution. So, there is literally no physical evidence.
However, I feel that the conditions warrant that the editor of the journal that accepted the paper be made aware of the circumstances.
I stand to gain nothing from either accepting or retracting the paper, nor am I employed by said company, but I am affiliated with the department and feel that such behavior corrupts out department and science as a whole.
So the question is whether it is appropriate to write an email to the editor stating the above and additional information?