Lock box code to stranger

[Brandon Smeltzer]

I just called an owner about a property that I'd like to see in a couple of days. He said he had some other properties to show but he said he would give me the code to the lock box so I can check it out. 

My wife is worried that this is not only an abnormal thing for an owner to do, but it's also a huge liability for me to go and see the property. 

Is this true?

Thanks!