The Z Fold Pressure Seal Checks system converts a form into a mailable document. In its simplest form, this system takes a printed document and folds and seals the document. Accu-Seal® Pressure Seal Systems provides one of the best one piece self-mailers available to the market today. Cohesive glue pattern and consistent and even adhesive lay-down provides a better seal for confidential information. Accurate perforation alignment for easier opening. The Pressure Seal Checks are great for the following: State Government, Doctor / Patient Letters, Hospital Billing, Membership Cards, Payroll Checks, City Tax Bills, Dividend Checks, Coupons, Direct Deposit.