# byte-order mark

A byte-order mark that this fixture-proven cleanup can remove outside a recognized C2PA text wrapper.

Canonical: https://watermarkslayer.com/supported-artifacts/byte-order-mark
Markdown alternate: https://watermarkslayer.com/supported-artifacts/byte-order-mark.md
Last reviewed: 2026-08-12

## Registry facts

- Code point or framing: U+FEFF
- Launch support: supported
- Launch action: remove
- Risk: low
- Explicit writer selection required: yes
- Visible review label: [byte-order mark]
- Fixture: fixture_remove_feff_outside_wrapper
- Last fixture test: 2026-08-12

## Why it may appear legitimately

It can occur as a decoded byte-order marker or a historical no-break marker, and it can lead a C2PA unstructured-text wrapper.

- Decoded text and copied rich text

## Launch behavior

Registry status: supported. Watermark Slayer can propose a reviewable removal edit only when the writer explicitly selects this supported cleanup.

## What a change could affect

Changing the marker can alter no-break behavior or damage credential-like C2PA framing.

- A marker beginning a recognized C2PA text wrapper is never removable.

## Claim boundary

Finding this artifact says only that the specified code point or framing was observed. It is not an authorship verdict, detector score, or evidence that text came from a particular system.

## Evidence

- [Unicode 17.0 Core Specification, Chapter 5](https://unicode.org/versions/Unicode17.0.0/core-spec/chapter-5/)
- [Unicode 17.0 Core Specification, Chapter 23](https://www.unicode.org/versions/Unicode17.0.0/core-spec/chapter-23/)