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Yes, but not in a plain paper envelope: rigid objects jam automated sorting machines and can crack. Use a padded mailer, sandwich the drive between stiff card so it can't bend, and expect a nonmachinable surcharge in the US since it can't run through the sorting equipment. LetterAgent can't mail one at all: it mails flat letters only, no objects.
Sorting machines are built for flat, flexible paper. Letters travel through rollers and curved paths at speed, and a rigid object inside a thin envelope becomes a problem twice over: it can jam the machinery, and it can be damaged by it. A USB drive will usually survive the encounter. An SD card, which is thin and brittle by design, can snap. Even the envelope itself suffers: a hard lump in a paper envelope tears the paper open in transit, and then the contents fall out into the mailstream, where recovery is unlikely.
This is also why "do not bend" written on an envelope buys you nothing. The marking is a request, not a routing instruction. Automated equipment does not read handwriting on the front of an envelope, and once the piece is in the machine path, the machine path is what it gets.
The goal is to keep the item flat, padded, and visible as a parcel, not a letter:
| Step | What to do | Why it matters |
|---|---|---|
| 1. Back up the data | Keep a copy of everything on the drive before mailing | Mail gets lost; data loss is the real risk, not the cost of the drive |
| 2. Sandwich it in stiff card | Tape the drive between two pieces of cardboard, slightly larger than the drive | Spreads bending force so the drive and card can't flex |
| 3. Use a padded mailer | Bubble mailer or a small rigid mailer, not a paper envelope | Padding absorbs impacts; a mailer is handled as a parcel |
| 4. Seal it well | Tape the mailer flap; small items pop open in transit | An open mailer loses small drives silently |
| 5. Consider tracking | Add tracking or send it as a tracked parcel | A lost untracked drive is simply gone |
For an SD card specifically, keep it in its plastic case if you still have it. The case is exactly the right shape to protect it, and it costs nothing to include. For a USB drive, a small piece of foam or folded paper towel around it inside the mailer stops it rattling against the card sandwich.
In the US, yes, through the nonmachinable surcharge. Any envelope that is rigid, square, or otherwise unable to run through automated sorting equipment pays extra on top of regular postage, because it has to be handled by hand. A USB drive in a padded mailer is the textbook case: it cannot flex through the rollers, so it is processed manually. Canada Post has similar non-standard and oversize handling rules, so expect the item to be priced as a parcel rather than letter mail on both sides of the border.
The practical upshot: do not try to sneak a drive through as a regular letter to save the difference. Underpaid mail gets returned to sender or delivered postage-due to the recipient, which is a worse outcome than just paying the correct postage up front.
No, and this is worth stating plainly up front: LetterAgent mails flat letters only. The format is fixed: 8.5x11 inch paper, single-sided, in a double-window envelope, with no inserts and no objects. A USB drive, an SD card, keys, coins, or any other rigid item cannot go through that process. For objects of any kind, the post office counter or a parcel service is the right route, with a padded mailer and the correct parcel postage.
Ready to mail it? Send your letter with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is printed and mailed.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
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