What are SEC requirements on brokers to remit payment for stock sold?

I sold stock through a broker on-line. I have received an on-line confirmation of the sale, but have never received the check. Is broker in violation of SEC rules? What recourse do I have to obtain payment of what they agree (in confirmation report) they owe me?|||Is it in your account? Typically, proceeds from sale of stock are put in your money market account if you're referring to e*trade, Schwab, Scott Trade, etc.; not sent in the form of a check unless you request it.