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Account & Personal Data Deletion Request

Effective & last updated: October 2, 2026

Applies to: The Dấu Mốc mobile application (developed and operated by Lucas Tran).

You have the right to request permanent deletion of your Dấu Mốc account and all associated personal data at any time. Deleting your account is free of charge and requires no reason.

1. Method 1: Delete directly in the Dấu Mốc app (recommended)

This is the fastest method and verifies your account ownership automatically:

  1. Open the Dấu Mốc app on your phone and sign in to the account you want to delete.
  2. Go to the Profile tab (bottom-right corner) → tap the Settings icon (⚙️).
  3. Select Account & Security → tap Delete Account.
  4. Read the notice regarding data deletion and confirm your request.

Immediately after confirmation, your account is deactivated and hidden from all other users. You have a 30-day grace period in case you change your mind (simply sign back in to cancel the deletion request). After 30 days, all data is permanently purged and cannot be recovered.

2. Method 2: Request deletion by email (if you uninstalled the app)

If you no longer have the app installed or cannot sign in, you can submit an account deletion request via email:

  1. Send an email to [email protected] with the subject line: "Dấu Mốc Account Deletion Request".
  2. Send the email from the exact email address registered with your Dấu Mốc account (or specify your registered email/username inside the message so we can verify ownership).
  3. We will send a confirmation reply within 72 business hours and execute the permanent deletion within a maximum of 30 days from confirmation.

Send deletion request email

3. Types of data permanently deleted

When your account deletion is completed, the following data is permanently deleted from our production database and cloud storage:

  • Account information: Full name, display name, username, email address, profile photo, cover photo, bio, and linked Google/Apple identifiers.
  • Rider's Passport & Stamp history: All GPS-verified stamps, photo-verified stamps, stamp timestamps, and location notes.
  • Journeys & GPS tracks: All recorded journeys, GPX tracks, coordinate points, distance, duration, and elevation profiles.
  • Photos & media: All photos uploaded for journeys, stamps, or reviews.
  • Social interactions: Reviews, comments, likes, follower/following connections, and push notification tokens.

4. Data temporarily retained and retention periods

Data Category Handling After Account Deletion Retention Period
Encrypted system backups Data inside automated database snapshots is automatically overwritten as backup cycles rotate. Maximum 30 days after permanent deletion.
Security & anti-abuse logs Technical logs (IP addresses, error events) used to prevent fraud and protect system integrity. Maximum 90 days, then automatically purged.
Aggregated, anonymized statistics Total stamp counts at a landmark (completely stripped of personal identifiers and unlinked from any individual). Retained indefinitely in anonymous form.

5. Deleting specific data without deleting your account

If you want to keep your Dấu Mốc account and only remove specific items, you can do so directly inside the app at any time:

  • Delete a specific Journey or GPS track: Open the Journey → tap the menu icon (⋯) → select Delete Journey.
  • Delete an uploaded photo or review: Open the photo/review → tap Delete.
  • Hide your activity from the public: Switch a Journey's visibility to Private or enable Only show GPS-verified stamps in your profile settings.

6. Support Contact

If you have any questions or need assistance regarding your personal data, please contact: