OK, first you have to have some money to launder…where and what form is it? How did you get it? Are you hot? Having the money might focus your attention and inspire you. Getting control of the money is certainly more challenging than laundering it.
Buying expensive cars with cash like Sammy the Bull just did in Arizona ain’t too bright laundering.
(a) Is it piles of small bills from a high volume criminal enterprise like street drug sales or casino skimming? People working in jobs such as emptying parking meters or bus and subway coin boxes have managed to steal hundreds of thousands over a period of a few years. (b) Is it piles of big bills from illegal commissions, bribes? © Maybe it’s megabucks in a bank/trust/brokerage account you can access and control.
Remember the movie “A Simple Plan”? It’s not easy for some hillbilly in Sheepdip Saskatchewan to enjoy his ill-gotten three million in cash with out attracting a tax related lifestyle audit.
Starting with case (a) lots of small bills - you need legal ownership or part ownership of one or more businesses, like restaurants, bars, maybe even a casino, anything that runs with a lot of cash. Then, instead of the real revenue of say, $7,000 a month, you generate $15,000 a month, pay your taxes, and appear to get slowly rich honestly. This can be delicate and may attract attention if you get greedy. The more businesses you can spread it around the better. another trick is the use of “smurfs” to run your small bills around town all day turning them into big bills. This works particularly well in Vegas. And brings us to (b) the mountain of big bills you are wanting to launder. Now you have a problem. There is a world war against cash money laundering underway. Where in the world can you walk into a bank with millions in cash without raising a few eyebrows? I don’t think Swiss banks will take it any more. The Jersey Islands might be good. They have total bank secrecy laws and are safe and honest. You have to smuggle it out to these places, probably packed in a yacht. Smuggling must be infinitely creative. If you have connections professionals might electronically deposit 50 cents on the dollar in your Cayman Islands, Jersey Islands, Panama, wherever, bank account and take the cash off your hands.
Cash is a horror because you will be killed for it. Money has no home and if you lose track of it for a split second it is gone.
If you manage to get control of a huge sum of money in some domestic account, you can easily electronically transfer it to your foreign bank account in a good bank in some foreign country with good banking secrecy laws and you are now in the sweet position of category © having control over a secret bank account with a lot of money in it.
So you are the guy previously discussed who has turned his huge mound of cash into a tidy Jersey Islands bank account, or a retired politician with a Cayman Islands bank account full of a lifetime of kickbacks, bribes, and re-directed public funds. Or let’s say you are the owner of a private company who has been having some big international sales receipts deposited into your foreign bank account and reporting the goods on your books as stolen in transit internationally. (Whatever, I certainly don’t know how to accumulate the money to launder.) Now you want to enjoy this money. You hire some local lawyers where the money is stashed (bank secrecy laws, bank secrecy laws…I can’t say it enough), set up a local company, put the lawyers on the board of directors to manage the company, and make yourself, and maybe your trophy girlfriend if you’re stupid, the only ones who can sign for the company’s money disbursements. This company will cost you as little as $20,000 a year to run, less in some countries. Then you invest all your money into this company’s bank account. Now you can live anywhere in the world. If you want to stay in Sheepdip Saskatchewan and rebuild the family farm you arrange to have the foreign company buy the farm and hire you to manage it. It may look funny - you being paid $300,000 a year to manage a clapped out farm but, if your employer’s bank secrecy laws are adequate, and you do your paperwork and pay your taxes, nobody can prove anything except that you work for a very stupid foreigner. You can live in a six million dollar apartment in New York and pay five hundred a month rent to some stupid foreign company and get away with it. Need cash to buy the family farm for yourself? That stupid foreign company will lend you the money and you can stiff them on the loan. Hell, they’re so stupid they might lend you money a second time if you promise to try and pay back the first loan. Foreign bank secrecy laws are the key to not getting caught. Also, if the crime that gave you the laundered money cannot be identified or tied to you that certainly helps. No guarantees that you won’t attract heat, but if you have good lawyers and accountants no-one will ever prove anything.
Money laundering is a pretty wide field and you might get better responses to your post if you are more specific about the scenario you are trying to envision. I hope some lawyers and accountants post some more professional advice here. I also hope I have been some help with your literary aspirations.