Your broker, only if you deposited your cert, can put in a sell order on your shares.  If you have not deposited your cert prior to going to skull and bones, no broker will accept them until they are released back to pink or higher.  They are electronically matched up with buy orders.  Also, if you have shares that you purchased, say two weeks ago, you can put in a sell order and when it matches a buy, its sold.  It's a blind proposition.   Please, anyone, if I am not completely accurate, correct me, it is important. This is my understanding of how it works without an MM. GLTY.