Supplemental Incident Report

A supplemental incident report is a dated add-on to an existing incident file. It is how you add information that was not known, not available, or not yet verified when the original security incident report was submitted.

What this form is

Once an original incident report is turned in, changing it quietly creates confusion: reviewers cannot tell what was known at the time. A supplement keeps the original intact and records what was learned later — a witness who came forward, a case number received the next morning, additional photos, or a correction to a license plate that was misread in the dark.

What security professionals use it for

Supervisors want a clean chain: original report, then numbered supplements. That matters when a client asks “what did we know on Tuesday versus Wednesday?” Officers use supplements so they are not pressured to alter a submitted page. The idea is the same as a DAR update or continuation: add, do not silently rewrite.

Typical information included

• Original incident report number, site, and date of the original event
• Supplement number (1, 2, 3…) and date/time written
• Name of the person writing the supplement (it may not be the original officer)
• What new information is being added, in chronological or clearly labeled form
• Source of the new information (officer observation, named witness, client email, police)
• Any change this makes to follow-up (notifications, evidence, status)
• Signature

When it should be used

Use a supplement when the original report is already submitted and something material is new. Do not use it as extra notebook paper during the first write-up — finish the original, or use additional pages issued with that original. Do not use a supplement to replace a DAR continuation sheet; shift-log overflow stays with the DAR.

Practical completion practices

• Say that you are adding information; do not pretend the original already contained it.
• If you are correcting an error, state the original wording and the corrected fact.
• Keep each supplement focused. Several small, dated supplements are easier to follow than one undated essay.
• Store supplements with the original incident packet so they are not orphaned in email.

This is a documentation practice form. Your company may require supervisor review before a supplement is filed. Follow that process.

These pages and templates are general resources for security companies and in-house teams. They are not legal advice and they do not guarantee that a document will meet a particular client’s, insurer’s, state’s, or workplace’s requirements. Follow your post orders and company policy.