How to Attach and Authenticate Exhibits to an Affidavit

To attach and authenticate exhibits to an affidavit, label each document clearly, describe it in the body of the affidavit based on your personal knowledge, state that it is a true and correct copy of the original, and tie your sworn description to the exhibit label so the court can match one to the other. Where you didn’t create the record yourself, obtain a written certification from the custodian instead of relying on your own testimony. Everything else — formatting, redaction, notarization or an unsworn declaration, filing, and service — sits on top of that foundation.

What the Affidavit Text Must Say About Each Exhibit

Authentication is the single most important step, and it happens inside the affidavit itself. The Federal Rules of Evidence require you to produce enough evidence to support a finding that the item is what you claim it is.1Legal Information Institute. Federal Rules of Evidence Rule 901 – Authenticating or Identifying Evidence For an exhibit attached to an affidavit, that foundation gets laid in the sworn text.

For each exhibit, the affiant needs to do three things in the body of the affidavit:

  • Establish personal knowledge. Explain how you know what the document is. Did you receive the email directly? Did you sign the contract? Were you present when the photograph was taken? A general statement that you “believe” a document is authentic doesn’t cut it. Affidavits used in motions must be based on personal knowledge and set out facts that would be admissible in evidence.2Legal Information Institute. Federal Rules of Civil Procedure Rule 56 – Summary Judgment
  • Confirm the copy is accurate. State that the attached document is a true and correct copy of the original. This language directly addresses the most common objection about whether a copy has been altered.
  • Link your testimony to the label. Reference the specific exhibit designation: “Attached as Exhibit A is a true and correct copy of the signed lease agreement dated March 15, 2025.” That sentence creates an explicit bridge between your sworn words and the physical document.

By swearing under penalty of perjury that the exhibit is genuine, you take personal legal responsibility for its authenticity. A fabricated or altered exhibit becomes a perjury problem on top of the underlying case.

Labeling and Organizing the Exhibits

Clear labeling is how the court connects your sworn words to the physical evidence. Use either letters (Exhibit A, Exhibit B) or numbers (Exhibit 1, Exhibit 2), and stay with one system across the whole filing. Mixing the two creates the kind of confusion that draws objections.

Give each exhibit a descriptive title that tells the reader what it is without having to flip to it — “Purchase Agreement dated January 5, 2025” rather than “Contract.” Place an exhibit index at the beginning of the attachments listing every exhibit by label, description, and page number. Adhesive exhibit stickers or coversheet pages mark where each exhibit begins.

For large submissions, sequential page numbering across the entire package (commonly called Bates numbering) gives every page a unique identifier, so nothing goes missing and everyone in the case refers to the same page by the same number. In electronic filings, PDF bookmarks or hyperlinks replace physical tabs.

Third-Party Records and Custodian Certifications

When the exhibit was created by someone else — a bank, a hospital, an employer — you generally can’t authenticate it through your own testimony because you didn’t create it and may not know how it was maintained. That’s where a custodian of records certification comes in.

The custodian or another qualified person from the organization provides a written certification confirming that the record was made at or near the time of the event by someone with knowledge, that it was kept as part of the organization’s regular operations, and that creating this type of record was a routine practice.3Legal Information Institute. Federal Rules of Evidence Rule 902 – Evidence That Is Self-Authenticating The certification replaces live testimony from the record-keeper and satisfies both the authentication requirement and the business records hearsay exception at the same time.

One procedural step people miss: before trial or hearing, you must give the opposing party reasonable written notice that you intend to offer the record along with the certification, and you must make both available for inspection.3Legal Information Institute. Federal Rules of Evidence Rule 902 – Evidence That Is Self-Authenticating Skipping the notice can get the record excluded even if the certification itself is fine.

Documents That Authenticate Themselves

Some categories of evidence don’t need the affiant’s testimony to prove they’re genuine. Under the Federal Rules of Evidence, self-authenticating items include:

  • Any document bearing a government seal and an official signature.
  • Copies of public records certified as correct by the custodian or another authorized person.
  • Official publications issued by a government authority.
  • Printed material that appears to be a newspaper or periodical.
  • Documents accompanied by a certificate of acknowledgment from a notary public or authorized officer.
  • Business records accompanied by a written certification from the custodian confirming the record was made near the time of the event by someone with knowledge, kept in the ordinary course of business, and created as a regular practice.3Legal Information Institute. Federal Rules of Evidence Rule 902 – Evidence That Is Self-Authenticating

Self-authentication doesn’t make a document automatically admissible. It still has to be relevant, and hearsay objections still apply. It simply means no one has to testify that the document is what it claims to be.

Hearsay: A Separate Hurdle After Authentication

Authenticating an exhibit doesn’t automatically get it admitted. A document attached to an affidavit is often an out-of-court statement offered to prove something is true, which is the textbook definition of hearsay.4Legal Information Institute. Federal Rules of Evidence Rule 801 – Definitions That Apply to This Article; Exclusions from Hearsay Hearsay is generally inadmissible unless a recognized exception applies.5Legal Information Institute. Federal Rules of Evidence Rule 802 – The Rule Against Hearsay

Two exceptions come up constantly with affidavit exhibits. Business records — invoices, ledgers, medical charts — qualify if the record was made close to the time of the event by someone with knowledge, kept as part of the organization’s regular operations, with creating that type of record being a routine practice. A one-off memo prepared for litigation doesn’t meet the standard. Public records — agency reports, property filings, and certain law enforcement records — can come in if they document the office’s activities or reflect findings from a legally authorized investigation. One limitation: in criminal cases, observations by law enforcement personnel are excluded from this exception.6Legal Information Institute. Federal Rules of Evidence Rule 803 – Exceptions to the Rule Against Hearsay

If your exhibit doesn’t fit an exception, it may still be usable for a purpose other than proving the truth of what it says — for example, showing that a notice was sent, regardless of whether its contents are accurate. Say so in the affidavit.

Copies, Originals, and Summaries

The Federal Rules of Evidence require an original when you’re trying to prove what a writing, recording, or photograph says.7Legal Information Institute. Federal Rules of Evidence Rule 1002 – Requirement of the Original In practice, courts routinely accept duplicates — photocopies, scans, printouts of electronic records — unless the opposing party raises a genuine question about the copy’s accuracy or argues it would be unfair to admit a copy. Stating in the affidavit that the exhibit is a true and correct copy preempts most objections on this point.

When the underlying records are too voluminous to review conveniently, you can present a chart, summary, or calculation instead of the full set. The originals or duplicates still have to be available for the other side to inspect at a reasonable time and place, and the court can order them produced.8Office of the Law Revision Counsel. Federal Rules of Evidence Rule 1006 – Summaries

Redact Sensitive Information Before Filing

Redaction is your responsibility, not the clerk’s. In federal civil filings, you must limit the following:

Federal criminal cases impose the same requirements.10Legal Information Institute. Federal Rules of Criminal Procedure Rule 49.1 – Privacy Protection for Filings Made with the Court Filing sensitive information without redaction and without a seal effectively waives the privacy protection for that information. Exhibits on affidavits often contain precisely the data at issue: bank statements with full account numbers, medical records with dates of birth, tax returns with Social Security numbers. Review every page of every exhibit before it goes to the court.

Notarization or an Unsworn Declaration

A traditional affidavit needs a notary public to administer an oath, witness the signature, and attach a jurat confirming the signer appeared in person and swore to the contents. Notary fees vary by state.

Federal law offers an alternative. Under 28 U.S.C. § 1746, an unsworn declaration carries the same legal force as a notarized affidavit if it includes specific language and a signature.11Office of the Law Revision Counsel. 28 USC 1746 – Unsworn Declarations Under Penalty of Perjury For declarations signed inside the United States, the required language is: “I declare under penalty of perjury that the foregoing is true and correct. Executed on [date].” For declarations signed outside the country, add “under the laws of the United States of America.”

The exhibit rules don’t change based on which format you use. Foundations, labeling, and redaction still apply.

Assembling, Filing, and Serving the Package

For paper filings, put physical divider tabs between the affidavit and each exhibit, and place the exhibit index immediately after the affidavit text and before the first exhibit. For electronic filings, PDF is the standard. Many courts require all exhibits combined into a single PDF or a main document with individual exhibit attachments; bookmarks stand in for tabs. Large filings may need to be split into multiple parts to stay under the court’s file size limit, so check local rules. Flattening the PDF before upload prevents formatting errors that can make the filing unreadable.

Once the package is ready, serve a copy on all opposing parties. In federal court, if the opposing party has an attorney, service goes to the attorney. Electronic filing through the court’s system generally constitutes service on registered users automatically. For parties not registered for electronic service, you can serve by hand delivery, by leaving a copy at their office, or by mail to their last known address. Any paper required to be served must be filed with the court within a reasonable time after service.12Legal Information Institute. Federal Rules of Civil Procedure Rule 5 – Serving and Filing Pleadings and Other Papers

After the submission is processed, you’ll receive either a stamped copy or a digital confirmation receipt showing the filing has been entered into the case record. Keep it with your file copy of the affidavit and every exhibit as submitted.