[raybbr]

Do you have to let them in? What happens if you don’t?

[Oberon]

No agent of the state, including social workers and child protective services personnel, may enter your home without your permission unless they bear a warrant specifying the reason for their presence, said warrant being properly issued and signed by a judge.

If they come without a warrant, even if accompanied by a police officer, you are under no obligation to let them into your house. In fact, it's in your best interests not to.

Understand, however, that if you turn them away because they don't have a warrant, the next thing they will try to do is to go get a warrant. That's why you want to have the phone number of a good local lawyer and the HSLDA on hand.

[DungeonMaster]

See #42 and #43 if you please.