In China, renting apartments, banking, and employment onboarding frequently require submitting ID card copies. If these copies fall into the wrong hands, they can be used for fraudulent account opening, loan scams, or registering shell companies — with devastating consequences.
Suried Tools Watermark has built-in ID document templates — generate "For XX use only" watermarks with one click, combined with date markings and diagonal tiling for maximum document security. All processing stays local, keeping your ID data private.
01 Why Must ID Document Copies Have Watermarks?
Chinese public security authorities have repeatedly warned: ID card copies must be marked with their intended purpose, or they may be used by criminals for fraudulent credit card applications, bank account openings, company registrations, or loan applications. Cases of identity theft have surged in recent years.
Adding a "For XX use only, void for other purposes" watermark to ID copies is a widely recommended self-protection measure. The watermark should cover key information areas without affecting normal legibility.
The same practice applies to copies or scans of passports, driver's licenses, household registration books, academic certificates, and other identity documents.
Under China's Resident Identity Card Law, using someone else's ID is illegal. But prevention is better than cure — watermarking copies is the simplest, most effective preventive measure.
02 Using Built-in ID Watermark Templates
Suried Tools provides preset watermark templates for common scenarios: "For rental use only", "For employment onboarding only", "For bank account opening only", "For XX business processing only", and more. Selecting a template auto-fills the watermark content.
Each template comes with optimal default opacity (30%), angle (-30°), and full-tile mode, ensuring the watermark is clearly identifiable without interfering with document text and photo recognition. You can freely adjust settings from the template baseline.
- For rental use only, void for other purposes
- For onboarding at XX company only
- For bank account opening only, void for other purposes
- For XX business processing only
- Custom purpose text
03 Customizing Purpose Text and Date Marking
Beyond preset templates, you can freely enter custom watermark text. The recommended format is: "For [specific purpose] only, [date], void for other purposes". Adding a date further limits the copy's validity window.
For example: "For China Mobile broadband application, June 2024 only, void for other purposes". This constrains both purpose and timeframe — even if the copy leaks, its exploitable value drops drastically.
Including a specific date in the watermark text is crucial. If your copy is valid only for a specific month, the risk of misuse drops significantly.
04 Best Practices for ID Document Watermarks
Use full-tile mode to ensure the entire document area is covered. Single watermarks are easily removed in Photoshop, but full-tile watermarks cover a large area, making removal prohibitively expensive.
Set opacity between 25%–35% — too faint and it's easily removed; too dark and it obstructs document information. Preview the result on both phone and computer screens.
Important reminder: When submitting ID copies to agents, landlords, or other third parties, always use watermarked versions. If the other party refuses to accept watermarked copies, be cautious — they may have improper intentions.
FAQ
Do banks or government agencies accept watermarked ID copies?
Most legitimate institutions accept ID copies with reasonable watermarks, as this is recommended by public security authorities. The watermark should clearly state the specific purpose (e.g., "For XX Bank account opening only") without obscuring key information beyond legibility.
Which is better: handwritten watermarks or tool-generated watermarks?
Handwritten watermarks (writing on the physical copy) are the traditional approach but suffer from unclear writing and incomplete coverage. Tool-generated watermarks provide uniform coverage and are harder to remove. Combining both methods offers the best protection.
Is it safe to process ID photos in Suried Tools?
Completely safe. All image processing in Suried Tools happens locally in your browser — ID photos are never uploaded to any server. This is the tool's biggest security advantage over other online watermark tools.
How should I position the watermark to prevent cropping removal?
Full diagonal tiling mode is the best anti-crop solution. The watermark covers the entire image, making it impossible to fully remove by cropping from any angle. Additionally, diagonally placed watermarks are harder for automated tools to remove compared to horizontal ones.
Should I add watermarks to electronic ID submissions too?
Especially so! Electronic copies are even easier to spread and misuse than paper copies. When sending ID photos via email, WeChat, or other channels, always add a watermark with clear purpose labeling. This has become a cybersecurity best practice in China.
Try the Tool Now
Suried Tools Watermark has built-in ID document templates — generate "For XX use only" watermarks with one click, combined with date markings and diagonal tiling for maximum document security. All processing stays local, keeping your ID data private.