Use this free, customizable template to effortlessly manage credit applications and foster smoother financial transactions for your business. How to use the template: 1.In the sample letter, fill in your personal information. Sample Letter of Credit. Listen. Get your bank loans easily approved with our free template, available in a Word doc and PDF format. It's editable and PandaDoc approved! Square offers two free generic credit card authorization forms for download. You do not have to process payments with Square to use these templates. Sample character reference letter templates you can download and print for free. A secured line of credit requires the customer to put up an asset as collateral.