user76717: I am trying to deposit bitcoin to bitmex, which only offers multisig wallets.
I have tried to send from both GDAX and Jaxx, but the addresses are reported as invalid. 
Apologies for the basic question, but how do I send to a multi-sig address?

user51948: You send bitcoin to a multisig address in the same way as a normal address. Multisig addresses are just a type of P2SH address which start with a 3, and have been supported by every major wallet and exchange for years.
If your address doesn't start with a 3, it's probably not an address at all. (Unless it starts with bc1 which is a very new address format and not widely supported yet)

76717: <p>I am trying to deposit bitcoin to bitmex, which only offers multisig wallets.</p>

<p>I have tried to send from both GDAX and Jaxx, but the addresses are reported as invalid. </p>

<p>Apologies for the basic question, but how do I send to a multi-sig address?</p>
 51948: <p>You send bitcoin to a multisig address in the same way as a normal address. Multisig addresses are just a type of P2SH address which start with a <code>3</code>, and have been supported by every major wallet and exchange for years.</p>

<p>If your address doesn't start with a <code>3</code>, it's probably not an address at all. (Unless it starts with <code>bc1</code> which is a very new address format and not widely supported yet)</p>
