This usually happens when you buy a used car and the previous keeper received a traffic debt.
You may be a victim of an ANPR drive-by clamping event.
Everything is invalid.
Paragraph 10 of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007 says:
An enforcement agent may take control of goods only if they are goods of the debtor.
If the debt is not yours, or the vehicle is exempt goods, then make a Claim to exempt goods.
The owner of the goods or vehicle has several other options. Here is More.
If you bought or sold a vehicle that has received a PCN incurred by another owner and enforcement action is being taken against you, the V5 does not prove ownership of a vehicle. You must make a sworn statement of truth proving when you bought or sold the vehicle and serve it on the council and copy in the bailiff.
Paragraph 7 of the Taking Control of Goods: National Standards says:
Creditors are responsible and accountable for the enforcement agents acting on their behalf. You do not need to make a claim against the bailiff company because liability resides with the creditor.
Sworn statement proving when you bought or sold the vehicle: