Your client/wallet detects it and offers a pop-up with registration or forfeiture options. Up to a certain amount (per person, per year) you can probably just pay a small excise tax (less than 100% forfeiture) to 'clean' it. Larger amounts without explanation would mean a visit from the taxman or Justice Department, however.
Genuine question, what happens then? And would the IRS necessarily see these regular deposits as inherently dirty, or merely unknown? If I were to make structured payments over a long period of time, low enough that they were unnoticed each time, how much pleading of ignorance would it take before the IRS decided that the person really did not intend for that to happen?
And could not someone disposit dirty money into their own account and plead the same? Even if you have to forfiet the money (if you haven't already accidentally spent it...) simply holding on to money temporarily can be avantageous.
>And would the IRS necessarily see these regular deposits as inherently dirty, or merely unknown?
Well, the logical thing is that would be perceive those as potentially dirty and have an inquiry. They might act legally as thinking they are "merely unknown", but they would be suspect of them nonetheless.
>If I were to make structured payments over a long period of time, low enough that they were unnoticed each time, how much pleading of ignorance would it take before the IRS decided that the person really did not intend for that to happen?
Well, if that was the case, why didn't the person protest the sudden influx of money over that "long period of time"?