TranzilaTK Tokenization & Unattended Recurring Billing
Purpose: Renew hosting plans, domains, and retainers automatically on WHMCS cron runs without customer intervention.
How it works: Initial checkout runs through Tranzila’s PCI-compliant flow (with 3D Secure support) and stores only the `TranzilaTK` token, last 4 digits, and expiry in WHMCS. Subsequent cron runs charge the token and support one-click refunds from the WHMCS invoice screen.