Stamping a Formal Application or Letter: When and How
When a formal application or business letter actually needs a company stamp, when it does not, and how to add the right stamp to a PDF in under a minute.
A company stamp on a formal letter or application is one of those reliquary touches that varies wildly by industry. Some organizations stamp every outgoing letter; others have not used a corporate seal in a decade. The rules are not uniform either: state filings, lender requests, and overseas counterparties each have their own conventions. This guide breaks down when a stamp on a formal letter or application actually matters, when a signature alone is enough, and how to add the right stamp to a PDF in about a minute without printing a thing.
When a stamp is actually expected
Most US states dropped mandatory corporate seals decades ago — Delaware, California, and New York all let companies operate without one. In practice, plenty of agencies, lenders, and international partners still expect a stamp.
- State filings from corporations (annual report, certificate amendments) — often expected
- Bank applications (account opening, signer changes) — depends on the bank’s policy
- Notarized affidavits and authorizations — notary seal is required
- Employee-to-HR letters (PTO requests, exit notices) — not needed, signature only
- Individual applications to any agency — just signature and printed name
- Job applications and offer-letter acknowledgements — not needed
- Internal memos and approval requests — manager signature is enough
When in doubt, stamp it. A stamp never makes a letter worse; missing one can occasionally cause a clerk to bounce the document back. Easier to drop a seal once than to redo the letter the next morning.
Types of stamps used on formal letters
Not every stamp on a letter is the main corporate seal. Different documents and workflows use different stamps.
- Round corporate seal with company name, state of formation, and year — the primary stamp
- RECEIVED stamp with date and reference number — applied by the receiving party
- PAID stamp with date — for letters acknowledging payment
- Notary seal — required on notarized affidavits and acknowledgements
- HR department stamp — for internal HR letters and employment verification
- "FOR CORRESPONDENCE" stamp — a simplified seal used internally
- Officer facsimile stamp — when authorized in corporate bylaws
How to stamp a formal letter in a PDF
The traditional path — print the letter, sign with a pen, apply the stamp, scan it back — takes 10–15 minutes and assumes you have a printer, scanner, and physical stamp on hand. Online, the whole thing takes a minute.
Step 1. Create or upload the letter. If it is a Word file, convert it to PDF first to lock in the formatting. If it is already a PDF or a scan of a paper letter, drop it directly into the editor.
Step 2. Add a signature. Place a facsimile signature above the printed name line. For company correspondence, this is the signature of the authorized officer or someone signing under power of attorney.
Step 3. Apply the stamp. The conventional placement is to the right of the signature, overlapping the signature by 10–20%. A typical round seal is about 1.5 inches across. The tool removes the white background automatically, so the seal lands cleanly and does not blot out the body text.
Step 4. Save as PDF. The stamp and signature are flattened into the page — the recipient cannot move or delete them even in a paid Acrobat Pro install.
Where the stamp belongs on the page
There are conventions for stamp placement. On many formal letters, the seal sits in the lower portion of the page, under the signature block. If the letter explicitly marks a "SEAL" or "L.S." location (common on corporate resolutions), drop the stamp exactly there — the center of the seal should align with the marker.
When no marker exists, the bottom-right of the last page, next to the signature, is the default. The stamp should not cover the dollar amount, the date, or critical reference numbers. On multi-page letters, the stamp typically appears only on the final page — though some agencies still ask for one on every page.
Inbound RECEIVED stamp on letters
When you submit a formal letter to an organization, the receiving party often stamps your copy with a "RECEIVED" mark — date and incoming reference number. This is critical for proving timely submission, especially in disputes, complaints, and tax refund requests with statutory response windows.
If you handle inbound mail yourself (an executive assistant, an office manager, or a small-business owner), use the pre-built RECEIVED stamp: fill in the date and reference number and click Apply. The stamp lands on the PDF in the conventional spot — the upper-left corner.
Common mistakes
First — stamp completely on top of the signature. The stamp should overlap the signature by 20–30%, not cover it. The signature must remain readable.
Second — too dark or too washed out. On real paper a seal has medium ink density — blue or purple at roughly 70% opacity. A jet-black stamp looks drawn-in; a faded gray one reads as suspicious.
Third — a round seal that ended up oval. When you photograph a stamp at an angle, it comes out as an ellipse. Use a square top-down photo, or build the stamp in the online builder — both produce a perfectly round result.