ULTRASEAL forms are tamper-evident, which makes them the perfect solution when you want to be sure that the end recipient is the only person opening the mailer. They are a cost-effective, labor-reducing and environmentally-friendly way to deliver invoices, business checks, utility bills, medical bills, business tax forms, statements, grade reports, test results, medical reports, collection notices, PIN notifications, bank documents, etc. They pair perfectly with Formax pressure seal equipment.