"Please clear your cache, If you are unsure of how to clear your cache, the following knowledge base article may be of help to you:
Answer Title: How do I clear my cache?Answer Link: http://zynga.custhelp.com/app/answers/detail/a_id/49
If after you have cleared your cache you find that you are still having issues please follow these steps.
1- Download the latest flash player if you are not already currently using it. http://get.adobe.com/flashplayer/?promoid=BUIGP
2- Remove the Mafia Wars application. If you do not know how to do this, instructions can be found here.http://zynga.custhelp.com/app/answers/detail/a_id/280
3- Restart your computer. Log back in to your social network and re-add the Mafia Wars application."
By following either two of these steps, you should be able to see the money laundering collection. To get the money laundering collection, you have to help your friends launder money, which will appear on your status feed.
Vaulting the money laundering collection reduces the bank deposit fee from 10% to 7%. This is not a bad collection, but it's a bit underwhelming; it will only be useful in Cuba. Odds are people still won't be able to steal even 7% of your money from fighting if you have a decent amount of it, so it is better to just keep it in your inventory if you have more than around 50,000,000 (either New York or Moscow) or so.
As a boost, you can get a "Money Sock" which makes each job you do pay out 50% more (pretty weak in my opinion, even if you get 7) considering how many people you are going to have to help to get that many collection pieces in the first place.
Thanks to Bharath S. for the information on both making the collection appear and the pictures.