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Where to Place Multiple Stamps on an Envelope
Put all postage in the upper-right corner, in rows, without covering the address or barcode area. Here is how to arrange 2, 3, or 4 stamps so mail is not returned.
Put every stamp in the upper-right corner of the envelope, arranged in a neat row or block. USPS sorting equipment scans that corner for postage, and it reads the total value. As long as the stamps are in that corner, do not overlap the address, and leave the bottom of the envelope clear, the arrangement is up to you.
Most returned “insufficient postage” mail is not about placement at all — it is about the total being too low. Placement problems are the smaller, easier-to-avoid category. USPS walks through the same corner-placement rule in its letter-mailing instructions.
The basic rules
- Upper-right corner only. Do not put stamps on the back, the left side, or the bottom.
- Keep the delivery address fully visible. The destination address belongs in the lower center; the return address goes top-left. Stamps should touch neither.
- Do not cover the stamps. No tape over the face of a stamp, no labels on top of it, no staples through it.
- Leave the bottom clear. USPS prints a barcode in the lower area for sorting. Stickers, stamps, or doodles there can force the letter to be hand-processed.
- Keep it flat. A thick stack of overlapping stamps makes the envelope lumpy, and a lumpy envelope can trigger the nonmachinable surcharge.
How to arrange two, three, or four stamps
| Stamps | Suggested arrangement |
| 1 | Centered in the upper-right corner |
| 2 | Side by side in one horizontal row |
| 3 | One row of three, or a row of two with one beneath |
| 4 | A 2 x 2 block, square and tidy |
| 5 or more | Rows from the top-right corner working leftward, keeping the block compact |
Work from the corner outward rather than spreading stamps across the envelope. A compact block is easier for machines to read and less likely to catch on equipment.
Practical tips for real mail
- Peel, do not cut. Self-adhesive stamps come off their backing cleanly. Cut-to-size older stamps with scissors if needed, but never cut through the denomination.
- Press from the center outward. That avoids air bubbles and curling edges.
- Mix denominations freely. A Forever stamp plus an additional-ounce stamp plus a 10¢ stamp is fine — USPS reads the sum.
- Do not reuse a stamp. Any stamp that has been through the mail is cancelled, even if the cancellation mark is faint.
- Check the total before you seal. A 2-ounce letter needs $1.11; two Forever stamps ($1.64) will mail it, but so will one Forever stamp plus one additional-ounce stamp ($0.29), which is cheaper.
When extra stamps are not the answer
Adding stamps cannot fix two problems:
- Oversized mail. A 9 x 12 envelope is priced as a flat starting at $1.69, regardless of how many Forever stamps you fit on it. You can overpay with stamps, but you cannot convert a flat into a letter.
- Nonmachinable mail. Square, rigid, or lumpy envelopes need the $0.49 surcharge on top of the letter price. Extra Forever stamps satisfy the money, but the piece still needs to be identified as nonmachinable — use a non-machinable surcharge stamp or hand it to a clerk.
Frequently asked questions
Can I put stamps on the back of an envelope?
No. Postage belongs in the upper-right corner on the address side. Stamps on the back are easily missed and can delay the letter.
Is it OK if stamps slightly overlap?
A small overlap of the margins is usually fine, but avoid stacking stamps on top of each other. Overlapping hides denominations and adds bulk.
Can I tape over stamps to keep them on?
Do not tape over the face of the stamp. If a stamp will not stick, replace it rather than taping it down.
Does USPS care which stamp goes where when values differ?
No. Only the total matters. Many people put the highest-value stamp first out of habit, but there is no rule.
What if my stamps add up to more than the postage due?
It mails. USPS does not refund the difference, so think of it as cheap insurance against a returned letter.
Keep the denominations you actually use on hand
Most returned mail comes from letters that needed one more ounce. Stocking Forever stamps alongside additional-ounce stamps solves nearly every case. Browse discount Forever stamps including 2019 Flags, plus commemorative stamps. Not sure how much postage a heavier letter needs? Read What Happens If You Underpay Postage and How to Buy Stamps.
Need the stamps? Browse our full shop of discount USPS Forever stamps.