Yes it is thought to mainly revolve around liability for (not) following explicit and implied contracts or for endangering others. Pretty much like tort law today but with parallel court systems, where the contract decides where cases will be heard, like in an arbitration clause.

And I totally forgot to directly answer the meme's "before people notice". Organizations like the USDA or accredited organic certifiers like NSF would basically be insurance companies and their investigation services. Respectable suppliers wouldn't operate without certification. So they would have regular inspections like they do today.