Is It Safe to Print Checks at Home?

The safest-way checklist

1. Use real check stock with security features. Blank check paper sold for this purpose includes things like microprint borders, a padlock icon, chemical-reactive paper (that stains if someone tries to bleach out the ink), and a watermark visible only at an angle. Plain printer paper has none of that, so stick to check stock meant for checks.
2. Print the MICR line with magnetic toner when you can. MICR stands for Magnetic Ink Character Recognition — the E-13B font along the bottom of a check that encodes the routing number, account number, and check number. The Check 21 Act (2004) lets banks process image copies of checks, so many deposits are scanned rather than magnetically read today, but some banks and high-volume processors still rely on the magnetic signal. Magnetic (MICR) toner is inexpensive and worth using if your printer supports a toner swap.
3. Never leave a blank, signed check lying around — printed or paper. A signed check with no payee or amount filled in is as good as cash to whoever finds it.
4. Keep your printer and computer clean. Keep your operating system and printer firmware updated, run antivirus/anti-malware software, and don't print checks on a shared or public computer.
5. Shred misprints and voided checks. Don't just toss a check with a smudge or a wrong amount in the trash — shred it, since it still carries your routing and account numbers.
6. Ask your bank about Positive Pay. Positive Pay is a service some banks offer businesses: you send the bank a list of checks you've issued (amount, payee, check number), and the bank flags anything presented for payment that doesn't match. This is a bank service, not something Quick Check Writer provides directly — your check register export (see below) is what you'd use to build that list.
7. Store PDFs and backups safely. A check PDF or a backup file contains the same bank details as the paper check. Keep them in a place only you can access, and don't leave them in a shared folder or forward them casually.

How Quick Check Writer actually handles your data

Separate from the printing side, the biggest safety question people have about check software is "where does my bank information go?" Per Quick Check Writer's privacy policy (updated Oct 27, 2026):

• Check data stays on your device. Company names, bank and routing/account numbers, payees, amounts, memos, logos, and signatures are stored only on the device you're using — they are never uploaded to Quick Check Writer or to Firebase.
• No ads in the app, no data sold. The app itself runs no ad networks or analytics scripts. Our website uses the Google Ads tag (cookies) only to measure whether our Google ads lead to visits and purchases. Your checks and bank details are never sent to Google or to us.
• Sign-in is separate from your check data. If you sign in with Google, email, or phone, Firebase Authentication keeps only your name and email or phone number — not your bank details.
• Payments go through Stripe or Google Play. Subscription billing is handled by Stripe on the web, or by Google Play billing in the Android app — Quick Check Writer itself doesn't store your card.

In practice, this means there's no server breach that could expose your account numbers, because the numbers were never sent to a server in the first place.

The flip side: your data only lives on your device

The same design that keeps your bank details private also means there's no cloud copy to fall back on. If your phone is lost, reset, or replaced without a backup, your saved companies, bank accounts, and check register go with it. The fix is simple but easy to skip:

• Use Export backup regularly, especially before switching phones, updating your OS, or clearing browser data.
• Use Import backup to restore everything on a new device.
• Treat the backup file itself like a sensitive document — it contains the same bank numbers as your checks, so store it somewhere protected, not in a public cloud folder with loose sharing permissions.

Is printing checks at home actually legal?

Yes. Printing your own checks is legal in the US as long as the routing and account numbers belong to an account you actually own or are authorized to use. What makes a printed check valid isn't the paper — it's correct, matching bank details, a legible payee and amount, and a real signature. Your bank ultimately decides whether to accept a given check, which is why it's worth printing and depositing a small test check the first time you use a new check stock or printer. Check fraud — printing checks against an account you don't control, or altering a real check — is illegal regardless of what paper or software was used.

See is it legal to print your own checks for more on this, and our blank check stock guide for where to buy stock with the right security features.

Related guides

• Is it legal to print your own checks?
• Do you need MICR ink?
• Blank check stock guide

Sources: Check 21 Act overview (Federal Reserve); Positive Pay explainer, CNB

Last updated October 27, 2026.