Some thoughts on how the government could flag these transactions.
In Texas if you hire someone that has a work visa they have a social security card that states for work purposes only stamped on it and they can't get drivers licenses so they might not have the correct id to transfer money as they only have a workers permit.
Another type of Id that the Biden era passed onto those classified as illegals instead of social security number would be itin numbers or identification numbers. These are registered through the federal government and are used by illegals or non residents to open up bank accounts etc. so if money is transferred from one of those banks accounts it could be flagged.
Also western union and like companies have a lot of information on to and from as part of the transaction that can be flagged. They have patterns that can be easily traced like any data base. so if someone else try's to send to a person they don't usually send to it will get flagged in the internal western union system. Bigger transactions willl come from bank accounts that are traceable and too cumbersome to transact as multiple cash transactions.
Lots of people here in the United States believe it or not only have foreign passports or drivers licenses as identification. These could be easily flagged. Some of these people unfortunately have drivers licenses or temporary id's which might get through the system but I would imagine that some states would start cracking down.
If they are really going to do this a plan will come out soon and most likely it will bar cash transactions and only go through bank accounts which will flag a lot of people.
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