Socket client, can I use any source IPs?

[buddha87]

When we create a socket for client side, we still can use bind to bind a IP address with client socket.

Based on my understanding, if I have mutiple NICs in the machine, I can use the different IP address to bind the socket with a specific NIC. But my question is, can I bind socket with a IP which is not belongs to any NICs in machine ? Is this allowed? I guess it should be ok, the only thing is server may not be able to reach the client since the source IP doesn't belongs to any NICs.

Thanks in advance.