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Security Check Pen – Fraud-Resistant for Checks & Documents | Black Ink

Protect your financial documents with a High-security writing tool designed to help prevent fraud and document alteration. This premium security pen uses specially formulated gel ink that bonds deeply with paper fibers, making it much harder for fraudsters to chemically “wash” or erase information — a common method used in check fraud.

Whether you’re signing Business checks, endorsing personal checks, completing tax paperwork, or finalizing legal documents, this security pen delivers durable, fade-resistant, waterproof ink that stays legible over time. The smooth medium point provides clean, consistent writing, while the comfortable grip makes it ideal for everyday use.

Perfect for small businesses, accountants, bookkeepers, and financial professionals, this pen offers a simple, affordable layer of protection for checks and other sensitive documents. Using a security pen helps safeguard your finances, reduce fraud risk, and provide peace of mind when writing important information.

Key Benefits

• Designed for Check Security – Special ink embeds into paper fibers to help resist chemical washing and alteration attempts.
• Permanent, Reliable Ink – Fade-resistant and waterproof black ink keeps signatures and information clear and intact.
• Smooth, Comfortable Writing – Medium point with consistent ink flow, ideal for checks, contracts, forms, and legal documents.

Recommended for use on checks, tax forms, contracts, leases, prescriptions, loan documents, and other important paperwork where permanence matters.

Custom Plain Text Stamp

• Self-inking stamp pad
• Customize up to 6 lines of information

This self-inking stamp is customizable for 2, 4 or 6 lines of information. Make thousands of impressions without worrying about refilling ink. Great for return addresses, check endorsement or business transactions.

Small - 2 Line Stamp: Stamp Size 2 1/4 x 1 1/8  Print Area 5/8 x 1 13/16 

Regular - 4 Line Stamp Size 2 5/8 x 1 1/8 Print Area 13/16 x 2 1/4

Large - 6 Lines Stamp Size 3 1/8 x 1 5/16 Print Area 15/16 x 2 11/16 

Double Window Check Envelopes – 3 5/8" x 8 5/8" – Self-Seal (Most Common)

This Double Window Check Envelope is security-lined for complete confidentiality and features a self-seal flap for quick, easy closure. Save hours on manual addressing with these convenient, efficient envelopes. Perfect for use with QuickBooks®-compatible checks and many other similar software programs that feature a check-on-top format, these envelopes make mailing fast, reliable, and hassle-free.

Designed for Confidentiality and Convenience:

These envelopes offer practical functionality with enhanced privacy. The security lining ensures that your checks and sensitive financial details remain hidden, reducing the risk of unauthorized viewing. Specifically designed with memo line privacy, the bottom window is positioned to cover the memo line of your checks, ensuring your sensitive information remains private. Whether you're mailing payroll, invoices, or payments, these envelopes simplify the process and provide a secure, professional solution for sending important documents.

Dimensions:

• Top Window: 7/8" x 3 3/4" (Positioned 3/8" from the left and 3/8" from the top)
• Bottom Window: 15/16" x 3 3/4" (Positioned 3/4" from the left and 3/4" from the bottom)

Simply insert your check into the envelope, press to seal, and you’re all set. For those looking for a gummed flap version, please refer to item # 8661 or search for "double window gummed" in the search box.