When my kids were young we would get sample books in the mail. The companies would call after a month and want to know when I would be paying. I told them I considered it a gift and if it wasn't they could see me the postage to send it back to them. Only had one company take me up on it and I mailed it back to them. Link below explains your responsibility for mailings like this. It is not a long read. I've pasted what I think are the important portions.
https://postalinspectors.uspis.gov/inve ... Fraud.aspxThese rules are codified in Title 39, United States Code, Section 3009. That section of the Postal Reorganization Act of 1970 incorporates these protections for American consumers and makes the mailing of unordered merchandise unfair methods of competition and unfair trade practices under the law.
If you do not wish to pay for unsolicited merchandise or make a donation to a charity sending such an item, you may do one of three things (in each case, by law, you have no obligation to the sender):
•If you have not opened the package, you may mark it "Return to Sender," and the Postal Service will return it with no additional postage charged to you.
•If you open the package and don't like what you find, you may throw it away.
•If you open the package and like what you find, you may keep it for free. In this instance, "finders-keepers" applies unconditionally.