someone requests [to exchange] BTC for cash in their bank account. The employee goes to the teller with a stack of cash and deposits it into the account once the BTC has gone through. The customer gets the funds instantly into their account because it was cash, and no reverse can take place.
Something like this?
Bitcoin to Cash LLC (USPS, WF & BofA account transfer, or cash deposit)But would this be legal.
That's a question specific to each legal jurisdiction. So, using the U.S. as an example, ... in the U.S. is it legal to do so? Most likely it is. Just register as a money service business and if necessary become a licensed money transmitter and follow full AML/KYC just like a bank does and there likely is not even a hint of there being a problem in doing that.
What you probably are asking though is ... would this be legal to do without registering as an MSB, without becoming a licensed money transmitter and without following AML and performing full KYC on each customer (e.g., accept bitcoins sent anonymously).
So that makes it a very good question.
There are really two parts of that transaction.
The first part is where the business is purchasing bitcoins from its customers and paying cash. The second part is delivering the proceeds of that purchase to a location and in a manner of the customer's choosing.
The first part is still undetermined. Are bitcoins money, or are they a commodity / digital good? If I buy bananas from you I certainly should be able to pay you cash for them without having to register as an MSB, or become a licensed money transmitter, or even know who you are. But bitcoins are different from bananas. So far though, there has been nobody that has reported (at least not publicly) any action from any regulator or other government agency regarding the purchase of bitcoins for cash. That still doesn't mean there's no problem with doing so, just that if it is a problem there is no enforcement on it to-date.
The second part, delivering the cash, might already be decided:
an armored car business that has knowledge that it is involved in the transportation of funds for deposit into the account(s) of a third-party (a person/entity other than the entity that provided the funds to the armored car business) would be a money transmitter for BSA purposes, because the armored car company in that case would be functioning as an alternate form of funds transmittal.
-
http://www.fincen.gov/news_room/rp/rulings/html/fincenruling2003-7.htmlIn other words, if the armored car picks up cash from Alice and deposits that cash into Bob's account at the bank the service is likely going to need to register as a money transmitter. If instead it deposits Alice's cash into Alice's account, then it is likely not a money transmitter.
So essentially it comes down to ... is this to be offered anonymously or is this to be offered where full AML/KYC is employed?