How to watermark an ID card to be safe and reliable?

In this case, you can add a text watermark and use a statement.

1. Text Watermark: Try to add translucent text watermarks to the four corners of the ID card photo without affecting the identification of key information. This not only ensures that the watermark will not block important characters and images, but also can play a significant anti-theft effect visually.

2. Statement of use: The watermark content should include a specific statement of use to avoid directly covering the watermark on the ID number or name, so as not to interfere with normal identification. However, an indelible boundary watermark can be added around these key information.