This is a civil matter. If you are unable to reach an agreement with your neighbor, you may wish to contact the Alaska State Troopers, City Police, or a private land-use attorney. For contact information, go to the emergency contacts section.
If you are not sure where your property corners are, Community Planning’s Platting Office is available to assist with finding any existing plats/subdivisions that show where property corners were placed historically. You may then be able to use a metal detector to find your corner marker. But, if that doesn’t work, you will need to hire a professional surveyor to physically locate existing. or place new, markers in the ground.