[anotherman554]

I doubt you are correct that you don't have to return it. If the item was sent to you by mistake then the law requires you to return it under the legal theory of unjust enrichment. You can only keep it if the unsolicited item was sent to you intentionally.

Here's a link for the U.S. state of Georgia but I would expect it to be the same in any state:

"When you receive promotional merchandise that you did not order, you have the right to keep it as a free gift. ..It is a different matter if the mailing you received was due to a mistake by the company. In these circumstances, Georgia law regarding “unjust enrichment” obligates you to return the item paid for by another customer. The company, however, will have to pay postage and handling or make arrangements to pick it up."

https://consumer.georgia.gov/consumer-topics/unordered-merch...