So you didn't update your V5 Registration Certificate for the car when you moved, yes ? Your situation is quite commonplace on this forum, and follows from the abolition of car tax discs, making it appear less urgent to update the V5.
However, unlike others, you say it isn't your car, and the reg number on the bailiff's EN is a different reg number, albeit almost correct. Having said all this, you must accept that you are partly to blame for this situation by not updating your PCN.
Can you please post up the documents you have.
How much do you owe the bailiffs ? If they visit you they will add on another £235, so if the sum is just the Order for Recovery amount plus their £75 we normally say pay them, and also submit an Out-of-Time Witness Statement, Forms TE7 and TE9. YOu can download these from the TEC website.