Privacy Policy

Your privacy and financial data security are our highest priority.

1. Local-First Architecture & Financial Privacy

Checking is engineered with a strict Local-First (Client-Side First) security model. When you use our application without logging in (Guest Mode):

• All bank check writing transactions, payee names, monetary figures, legal amount strings, check serial numbers, and MICR lines are processed entirely inside your web browser.
• None of your sensitive check writing data is transmitted to, collected by, or stored on our servers.
• Your custom calibrated presets, payee records, and print logs remain strictly within your local browser storage (LocalStorage). Other users of this website have zero access to your information.

2. Cloud Accounts & Optional Cloud Backup

If you choose to create a free registered account to synchronize your check templates and payees across multiple devices:

• We collect your account email address, full name, and an encrypted password hash (via standard bcrypt hashing).
• We store the specific check templates, printer offsets, and payees that you choose to back up to your private account.
• Your account data is partitioned and strictly accessible only when authenticated with your credentials.

3. Browser Cookies & Local Storage

We use browser LocalStorage to store essential operational parameters:

• Active printer profile calibration offsets (millimeter horizontal and vertical adjustments).
• Custom template coordinates and date format formatting preferences.
• Offline print queue logs and payee registries.

4. Google AdSense & Third-Party Advertising

To provide this software completely free to the public, this website may display advertisements served by Google AdSense and affiliated ad networks.

• Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to our website or other websites on the internet.
• Google's use of advertising cookies enables it and its partners to serve ads to our users based on their visit to our site and/or other sites on the internet.
• Users may opt out of personalized advertising by visiting Google Ads Settings. Alternatively, you can opt out of third-party vendor cookies for personalized advertising by visiting www.aboutads.info.
• Print Immunity Guarantee: Under no circumstances are advertisements ever printed on bank checks or included in physical print preview outputs.

5. Data Retention & Deletion

Because guest data is stored on your local device, clearing your browser cache or LocalStorage permanently removes all local data from your device. Registered users can delete their custom templates, logs, and account data at any time via the user interface or by contacting support.

6. Contact Us

If you have questions about this Privacy Policy or our client-side security architecture, please contact us through our official support channel or repository.