During this time the Locations Department (most likely the Location Manager in situations requiring the most responsibility) will have contacted and begun negotiation with internal and external parties that may affect ability to film at the location. This is known as "clearing the location": investigating and confirming availability and fees to be paid to a location owner or agent, obtaining a certificate of insurance, obtaining any needed film permits (may involve fees). Also, there might be distribution of "resident letters" or "filming notifications". These are notices to neighbors, advising them of intent to film in the area (often a local requirement). These steps result in "locking down": making sure that all details and existing or potential issues are addressed. While it is the Locations Department's job to anticipate and minimize problems associated with a location, it is also the Locations Department's duty to advise other Production Department heads of intractable problems that need consideration so contingencies can be planned. This may lead to a decision to use an alternate location. This might involve additional planning and budget allocation for additional location scouting.