RendaOK is property management software for landlords in Portugal, automating rental income collection and documentation. It generates compliant receipts upon payment confirmation and distributes them to tenants and accountants. For delayed payments, the system creates legally binding evidence with timestamps and notifications, suitable for court or debt collection. The platform supports Portuguese fiscal requirements, including IRS Category F reporting, NRAU compliance, and AT-compliant receipts. It tracks rental contracts, renovations, and profitability while digitizing expense receipts with OCR technology, organizing them by property, and providing automated fiscal reports pre-categorized for taxes. Accessible via secure email links, tenants can view receipts, shared documents, and report issues, while accountants have read-only access to fiscal data. Landlords monitor portfolio status, payments, and profitability through a dashboard with a portfolio map for an overview.