You cannot sell another person's real property unless they execute a Power of Attorney that gives you the authority to convey on their behalf. The buyer's attorney will require an original copy of the POA and an affidavit from you stating the POA has not been revoked. Those documents will be recorded with the deed of conveyance in the land records.
On the other hand, if you are simply asking if you can sell another person's property and keep the proceeds the answer is no. You can only sell what you own. Your deed would be null and void and you may face criminal prosecution.
You cannot sell what you do not own. For real estate and motor vehicles only the person who holds title can legally transfer the title to a new owner. For personal property, if you sell personal property that belongs to someone else you would be stealing that property.
Larceny is stealing someone elses property, so your answer is stealing firearms
That depends on the law of your state.
Propety Damage covers you if you damage someone elses property. Liability covers you in the event of a lawsuit.
One year is the time limit someone can claim property left behind on someone else's property in the state of California. After the one year time period is up, the item is up for grabs.
computer piracy
No. Just Give it back to them if they don't want it sell it.
chuck it off your property
Trespassing means if you go somewher etc: into a room, a house of someone elses withought permission
Your own trees, on your property, no. Someone elses trees, without getting permission - yes.
Walking a mile in someone elses shoes.
The decision to close the factory will devalue the surrounding properties in the area.
I want to report immigrants using someone elses documents.