The BO-3 is a "Strict Reporting Form" (BSO) used when providing services to the public. It typically consists of three parts: Given to the customer when they pay. The Order-Voucher: Kept by the business to track the work. The Copy: Used for accounting and tax purposes. Where to Download (Free Resources)
You don’t need to design this from scratch. Several professional document portals provide clean, ready-to-print templates:
Check Glavkniga for updated versions that comply with current local regulations. Top 3 Tips for Filling Out Your BO-3
Sites like Form-Bblank offer downloadable versions that you can fill out digitally before printing.