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Home > Guides > Return to sender on junk mail
No, not really. The post office only sends First-Class mail back to the sender. Almost all junk mail is marketing mail, which is never returned: writing "return to sender" on it just gets it recycled or discarded at the post office. If you want less junk mail, you have to opt out at the source.
It comes down to what the sender paid for. First-Class mail includes forwarding and return service in the postage: the post office will try to get it to the right person and send it back if it cannot. Bulk and marketing mail (USPS Marketing Mail, formerly Standard Mail) is a cheaper class of postage that buys none of that. The sender paid a discount rate precisely because they do not want returns, corrections, or forwarding. The post office handles it accordingly: undeliverable marketing mail goes into recycling or a waste bin, and that is the end of it.
Your "return to sender" note does not change the deal. It does not create a service the sender did not buy, and it does not get the mailer's attention. The carrier or the clerk who sees the marking on a marketing piece will treat it the same way: discard.
Look at the postage marking in the top-right corner. Marketing mail usually shows a printed indicia box instead of a stamp, with wording like "Presorted Standard" or "USPS Marketing Mail." First-Class mail shows an actual stamp or a meter mark that says First-Class. Credit card offers, insurance pitches, catalog offers, and "or current resident" pieces are marketing mail almost without exception. Bills, statements, and personal letters are First-Class and would be returned if you marked them.
| Mail class | Marked "return to sender" | What actually happens |
|---|---|---|
| First-Class (stamp or meter mark) | Returned to sender at no charge | Goes back; worth doing for someone else's mail |
| Marketing Mail (indicia box) | Not returned | Discarded or recycled by the post office |
| "Or current resident" pieces | Not returned | Not forwarded either; it was never addressed to a person |
| Periodicals (magazines) | Not returned unless endorsed | Same bulk-mail logic: recycled |
You have probably heard this one: take the junk mailer's own business-reply envelope and mail it back stuffed with the rest of the junk, so the mailer pays return postage for a heavy envelope. People love this idea. In practice, business-reply envelopes carry a weight limit (usually about an ounce or two before surcharges), and deliberately overloading them is mail abuse, not a clever loophole. Post offices and mailers have seen every version of it. It is satisfying to imagine and pointless to do.
The honest answer is boring: opt out at the source. For credit and insurance offers, the credit bureaus run a joint opt-out that stops prescreened offers. For catalogs, contact each catalog company directly and ask to be removed: a phone call or the opt-out on their website works. For general marketing lists, the national marketing associations run opt-out registries that suppress your name across many mailers. None of this is instant; lists circulate for months before your removal propagates.
In Canada, the same principle holds. Canada Post's unaddressed admail is reduced by putting a "no admail" note on or in your mailbox or community box, though addressed junk mail (with your name) has to be opted out company by company. And opting out of everything will not stop mail from companies you already do business with: that is governed by your account preferences, not by a registry.
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