The Fourth Amendment protects against unreasonable searches and seizures. It requires a warrant, based on probable cause, for searches.The Fourth Amendment does not prohibit the warrantless seizure of evidence of a crime in plain view, even if the discovery of evidence was not inadvertent. Have you ever wondered what the 4th amendment really means for your rights? Our attorneys discuss a "reasonable expectation of privacy" and more! Landlords and tenants in Orange City, Iowa are forced to open their doors to government officials without a warrant, simply because the property is a rental. Landlords and tenants in Orange City, Iowa are forced to open their doors to government officials without a warrant, simply because the property is a rental. These protections are grounded in state law and the Fourth Amendment to the U.S. Constitution. The rule in a warrantless search of premises. At the Intersection of Patent Law and FDA Law.