I mean this is basically how debt collection works provided that you had bought some paperwork in the wake of the 2008 housing crash and you send other paperwork to the leanholder, apparently.
Please tell me he is literally putting JON DOE in his letter and not just using it as a placeholder for his real name (which I assume people can see) on Facebook...
Fairly certain that it's gonna be a CFO of like... A car company. Within the realm of sovcit stuff, I find this one to be rather coherent, but maybe I've just been reading these for too long. He's basically saying: in order to pay the "John Doe" debt, grab the money from the super special secret money account of "JOHN DOE", and do that every month until it's paid off.
Relatively normal stuff, except that he should probably be asking the credit department instead of the CFO, and also that the super secret money account never existed.