People become surety for the debt by a number of different ways. One way is by a Birth Certificate when the baby's footprint is placed thereon before it touches the land. The certificate is recorded at a County Recorder, then sent to a Secretary of State which sends it to the Bureau of Census of the Commerce Department.
This process converts a man's life, labor, and property to an asset of the US government when this person receives a benefit from the government such as a drivers license, food stamps, free mail delivery, etc. This person becomes a fictional persona in commerce. The Birth Certificate is an unrevealed "Trust Instrument" originally designed for the children of the newly freed black slaves after the 14th Amendment. The US has the ability to tax and regulate commerce.
http://www.usavsus.info/
I believe this is also the same process implied for registration of a vehicle. Its a title transfer via trust instrument. So legally we are all sold into servitude by our parents at birth. At gunpoint I might add.
The question to ask is how does someone op out of this contract?