Ask for identification when an officer shows up to your house with a search warrant. Verify that he is the agent in charge.
Request your copy of the search warrant, and, if desired, a copy of the original affidavit. Authorities can only have the warrant on the premises, but the officer should present you with a copy before he is allowed to search the premises.
Go to the clerk at the court that issued the warrant if you need a copy. Be sure to bring your driver's license or picture identification, and your birth certificate in case it is needed to identify you.
Present the proper identification to the clerk and request a copy of the court-ordered search warrant along with any sworn information used against you to obtain the warrant. You might need to pay a small fee to receive the warrant or report.