The named defendant who appears on the first amended complaint should either file a motion to quash service of summons on first amended complaint OR simply file an answer to first amended complaint.
You do not necessarily have to file a first amended prejudgment claim of possession form, although I suggest you do.
Frank W. Chen is licensed to practice law in the State of California. The information presented here is general in nature and is not intended, nor should be construed, as legal advice. This posting does not create any attorney-client relationship with the author. For specific advice about your particular situation, consult your own attorney.