Quote from Bolimomo:
Your question really puzzled me.
So if I understand it correctly, you were saying Broker A gave you a margin call for whatever reason. And you asked if you can just transfer the assets from Broker A to Broker B to avoid dealing with the margin call?
A margin call is like a note from the broker saying: "Mr Customer. We lend you some money so that you can buy more stocks. But your stocks' value has declined and now it is not enough to cover our risks. We need you to cough up with more money to cover ourselves. If you are not able to come up with more money within X days, we will be forced to liquidate some or all of your positions to cover our risks."
If you have an outstand margin call on your account, Broker A may not transfer the asset out of your account until the margin call is satistified.