To write an attestation letter, put it in standard business-letter format on letterhead when you have it, identify yourself and your relationship to the subject, state only the facts you personally know (names spelled correctly, dates and dollar amounts exact), offer your contact information for verification, and sign it in ink. If the recipient needs a sworn statement or a declaration under penalty of perjury, a plain letter will not do the job.
Before You Start: What You Need in Hand
Collect everything before you draft. Chasing down a missing date or a misspelled name after you’ve signed means starting over.
Pull together the recipient’s full name, title, organization, and mailing address, along with your own name, title, phone, email, and address. Then gather the verifiable facts themselves: the specific dates, dollar amounts, addresses, qualifications, or events you intend to confirm. If pay stubs, a lease, transcripts, or similar records back up what you’re saying, keep them open in front of you so you can cite them accurately rather than from memory.
Know the purpose before you write. A letter addressed “To Whom It May Concern” when the agency gave you a specific contact name reads as careless. If the requesting party sent instructions about what the letter must contain, follow them to the item. Agencies routinely reject attestation letters for missing a single required data point, and a resubmission can add weeks.
One qualifier runs underneath all of this: firsthand knowledge. You must have personally witnessed or directly know whatever you confirm. An attestation built on secondhand information or guesswork carries no weight and creates exposure for you and for whoever submits it. If you’re asked to attest to something you did not observe or cannot verify, decline.
How to Structure the Letter
Attestation letters follow standard formal business-letter format. Deviating does not make yours stand out; it makes it look unreliable.
- Header: your name, title, organization (if any), and full address at the top, followed by the date.
- Recipient block: the recipient’s full name, title, organization, and address directly below the date.
- Salutation: “Dear Mr./Ms. [Last Name]” or the specific contact name provided. Use “To Whom It May Concern” only when no name is available.
- Subject line: one line stating the purpose, such as “Attestation of Employment for [Full Name].”
- Body: two to four paragraphs covering who you are, your relationship to the subject, the attested facts, and your willingness to answer follow-up questions.
- Closing: “Sincerely” or “Respectfully,” followed by your handwritten signature, typed name, title, and contact information.
If you are writing on behalf of an organization, use official letterhead. A letter on plain paper from someone claiming to speak for a company raises immediate credibility questions.
What to Put in Each Paragraph
The opening identifies you and states the letter’s purpose in one or two sentences. Do not bury the point. “I am writing to confirm that [Name] was employed at [Company] from [Date] to [Date]” is the right register. Save the supporting detail for the body.
The body paragraphs present the attested facts in plain, factual language. Every claim should be something you can personally verify. Avoid opinions, speculation, and hedging language that undercuts the letter’s value. Organize the facts logically so the reader is not hunting for what they need.
The closing reaffirms that the information is true to the best of your knowledge and gives your contact details for follow-up. This is not a throwaway. Many recipients will call or email to confirm, and making that easy strengthens the letter. End with a formal sign-off.
Adjusting the Letter to Its Purpose
The structure stays the same; what changes is what belongs in the body.
Employment
The most frequently requested type. Print it on company letterhead and include the employee’s full name, job title, dates of employment, and whether they are currently active or separated. If salary verification was requested, include the compensation amount and pay frequency. The writer should be a supervisor, HR representative, or officer who can confirm the details from company records.
Character
Courts, licensing boards, and immigration agencies ask for these. They succeed or fail on specificity. “He is a good person” accomplishes nothing. Say how long you have known the individual, describe the context of your relationship, and give a concrete example that illustrates the trait at issue. “He coached his daughter’s soccer team for six years and never missed a game, even rearranging his work schedule to make practice” is far more persuasive than a string of adjectives.
Residency
Common in school enrollment, voter registration, and benefit applications. Include the full address, the dates of residency, and your basis for knowing. A landlord can reference lease dates. A neighbor can state how long they have lived nearby and how they can confirm the person’s presence.
Financial
Banks, insurers, and government agencies sometimes need letters confirming account balances, income sources, or outstanding debts. These typically must come from an authorized representative of a financial institution on official letterhead. Include the account holder’s name, relevant account identifiers, the specific figures, and the date the information is accurate as of. Precision matters more here than anywhere else because the numbers will be cross-checked against other records.
Signing, Notarizing, or Declaring Under Penalty of Perjury
Sign in ink above your typed name unless the recipient has confirmed they accept electronic signatures. Under the federal ESIGN Act, an electronic signature cannot be denied legal effect solely because it is electronic.1Office of the Law Revision Counsel. 15 U.S. Code 7001 – General Rule of Validity But the practical question is whether the specific recipient accepts one. Many government agencies, courts, and licensing boards still require wet-ink signatures. If the instructions say “original signature,” that means ink on paper.
Notarization is not required for every attestation letter, but professional licensing applications, real estate transactions, court filings, and some immigration submissions may demand it. The notary verifies your identity and witnesses your signature; they are not certifying that the contents are true. Fees vary by state, typically running from a few dollars to about $25 per signature, and remote online notarization is available in most states at a somewhat higher cost. If you are unsure, ask the recipient. An unnecessary notarization causes no harm; a missing one causes delay.
One category boundary is worth flagging before you write. An attestation letter is a signed statement of facts you know; an affidavit is a sworn statement signed before a notary who administers an oath. The two are not interchangeable. Federal law also recognizes a middle option: under 28 U.S.C. § 1746, an unsworn written declaration carries the same legal weight as a sworn affidavit if it includes language stating that you declare “under penalty of perjury” that the contents are true and correct, with the date and your signature.2Office of the Law Revision Counsel. 28 USC 1746 – Unsworn Declarations Under Penalty of Perjury Before you draft, confirm which of the three the requesting party actually needs. Sending a plain attestation when an affidavit or a § 1746 declaration was required means starting over.
Before You Send It
Proofread against your source documents, not from memory. Check every name, date, dollar figure, and address against the originals. A single transposed digit in a salary or employment date can trigger a fraud inquiry when the recipient cross-references your letter against their records. Read it once for content accuracy and once more for grammar and spelling.
Keep a copy of the signed letter and the supporting documents you relied on. If a question comes up months later about what you confirmed, you need your own record.
Deliver by the method the recipient specified. Certified mail creates a delivery record, which matters when deadlines are involved. A scanned PDF by email is faster and increasingly accepted, but confirm the recipient treats a scan as sufficient. For court filings and licensing applications, in-person delivery or certified mail is the safer choice.
What a False Attestation Can Cost You
Signing an attestation is not a casual act. If the facts turn out to be false and you knew it, the consequences run from embarrassing to criminal.
A false attestation submitted to any branch of the federal government can be prosecuted under 18 U.S.C. § 1001, which covers false statements in federal matters and carries up to five years in prison and a fine of up to $250,000 for individuals.3Office of the Law Revision Counsel. 18 U.S. Code 1001 – Statements or Entries Generally4Office of the Law Revision Counsel. 18 U.S. Code 3571 – Sentence of Fine If you signed a declaration under penalty of perjury, a false statement also triggers federal perjury charges under 18 U.S.C. § 1621, with the same five-year maximum.5Office of the Law Revision Counsel. 18 U.S. Code 1621 – Perjury Generally False attestations in immigration proceedings carry their own penalties, including fines, up to five years in prison, and a permanent bar from preparing future immigration applications, with higher exposure for repeat offenses.6Office of the Law Revision Counsel. 8 USC 1324c – Penalties for Document Fraud
Civil exposure is separate. Anyone harmed by relying on your false letter — a lender, employer, or licensing body — can sue for damages. Professionals who sign false attestations also risk losing licenses, certifications, or memberships in fields where trust is the product.