Legal Question in Landlord & Tenant Law in California

The first amended complaint likely substituted a fictitiously-named DOE with an actual person's name. DOEs are included in a complaint as placeholders when the landlord (or plaintiff) doesn't know the names of others. If you're living at the premises in question, you might seek legal assistance since otherwise the landlord could get a judgment against everyone occupying the premises by default, and then have the sheriff evict you and everyone else a few days later.

You need to respond to the unlawful detainer action, or at least figure out who is being evicted. Don't ignore it, as the sheriff may come in and move you out onto the street.