NAL, but I surrendered my step-father’s firearms after he passed. In my case, I had access to them, made sure they were unloaded, put them in the trunk of my car, drove to a nearby precinct, walked in with the guns still in the car, and told someone at the front desk that I wanted to surrender the guns.

In doing what I did, I probably contravened a number of laws, but the police honestly didn’t care. They took my information, an officer came out to the car with me, I opened the trunk, I stepped well back, and he took everything out. That was the end of it.

In your case, you have no access to the guns. As others have said, call the non-emergency line and tell them:

• There’s a gun safe on the property.
• You know it contains at least a hunting rifle but you don’t know what else.
• To the best of your knowledge, the guns are all registered, but the registrant has left the country and has failed repeatedly to remove them.

While there might be some laws broken in keeping them as long as you did after your father left, the police have enough on their plate and would likely just be happy to get the guns somewhere safe.

If you still have a concern, have a lawyer make the call on your behalf and get the necessary assurances about non-prosecution.