QBO Check Proxy Printer

Open-source proxy print driver for QuickBooks Online checks.

What it does

• Installs as a virtual printer that looks identical to your real printer (Sharp MX-5071 or any other)
• Captures the print job from QuickBooks Online
• Converts to PDF and holds it in a queue
• Sends a notification (webhook / push) so you can review and digitally sign remotely
• Overlays your signature image on the PDF
• Releases the signed PDF to the real printer

Why this exists

QuickBooks Online has no native remote digital signature support for printed checks. This gives you full control without paying for third-party services.

Architecture

• Windows port monitor + print processor (C# / .NET)
• Simple queue service (holds jobs, exposes API)
• Mobile/web approval interface (sign and release)
• Signature overlay using PDF libraries

Getting started

See docs/SETUP.md for installation and configuration.

Target printer: Sharp MX-5071 (but works with any Windows printer).

Status

Starter project. Core interception works; queue, notifications, and signature overlay need implementation.

Contributions welcome.