My son-in-law is making in an Electrical Trades training program for which he left his former employer, but who won't report the hours he worked ther

The question

My son-in-law is making excellent progress through an Electrical Trades training program for which he left his former, also an electrical repair company, employer. But that employer refuses to report Tom's hours to the proper administrative authorities that will enable Tom to immediately assume Journeyman status upon Tom's graduation from the program. How to force the disgruntled former employer to come across with the documentation of Tom's hours?