How to safely redact and watermark an ID card before you share it

Sending a copy of your identity card (IC), passport, or driver's license is a common request, for opening an account, signing a lease, or verifying your identity. The problem is that once a plain copy leaves your hands, it can be reused for things you never agreed to. The safest habit is to mark up the copy so it is clearly tied to a single purpose before you send it. This guide explains how.

Why a plain photocopy is risky

An unmarked copy of your ID looks identical to any other copy. If it is intercepted or stored carelessly, it can be attached to a different application or used to impersonate you. Adding visible marks that state the intended use makes the copy far less useful to anyone else.

What "safe redaction" means here

There are two related ideas, and it helps to keep them separate:

• Marking for single use: drawing lines across the document and stamping it with a label such as "for account opening only" so the copy is bound to one purpose.
• Hiding sensitive fields: covering numbers or details the recipient does not need, for example blacking out all but the last few digits of an ID number.

A word of caution about hiding fields: to truly remove information, the underlying content must be gone, not just hidden behind a colored box. Because PawPDF builds a fresh PDF from your marked-up image, the marks are baked into the final image rather than sitting on a removable layer.

Do it with PawPDF, step by step

• Open the ID Card to PDF tool.
• Add the photo or scan of your ID. You can include the front and back.
• The tool crosses the document with two diagonal lines (a "palang" pattern) and adds a label describing the intended use, so the copy is visibly bound to one purpose.
• Download the finished PDF and send that, never the untouched original.

All of this runs entirely in your browser. Your ID image is never uploaded, so the most sensitive document you own does not travel to a server.

Practical tips

• Make the purpose specific: "for XYZ Bank account opening, June 2026" is better than a generic stamp.
• Keep the marks legible but do not cover the details the recipient genuinely needs to read.
• Send the marked PDF through a channel the recipient expects, and delete extra copies when you are done.