["customer_name", "customer_account_number", "invoice_number", "original_amount", "late_fees", "collection_fees", "total_amount", "due_date", "days_overdue", "currency_symbol", "payment_link", "final_deadline_date", "deadline_days_remaining", "collections_agency_name", "collections_email", "collections_phone", "business_hours", "company_legal_name", "company_address", "company_tax_id", "business_license", "tracking_pixel_url", "footer_text"]