Engineering Team

PII Redaction: Protecting Customer Data Before AI Processing

Privacy Security AI

Customer support tickets often contain sensitive personal information: email addresses, phone numbers, credit card details, home addresses, and more. Sending this data to an external AI provider is a privacy risk and a compliance nightmare. Tickets Copilot solves this with automatic PII redaction.

What is PII redaction?

PII (Personally Identifiable Information) redaction is the process of detecting and masking sensitive data before it leaves your infrastructure. Instead of sending raw ticket content to an AI provider, the system first scans the text, identifies PII patterns, and replaces them with harmless placeholders.

How it works

Our PII redaction system uses a combination of pattern matching and entity recognition:

  • Email addresses: Detected via RFC-compliant regex patterns and replaced with [EMAIL_REDACTED]
  • Phone numbers: International number formats detected and replaced with [PHONE_REDACTED]
  • Credit card numbers: Detected using Luhn algorithm validation and replaced with [CREDIT_CARD_REDACTED]
  • SSN/Social Security: Detected via format patterns and replaced with [SSN_REDACTED]
  • Physical addresses: Detected using heuristics and replaced with [ADDRESS_REDACTED]

Redaction happens before any data is sent to the AI provider for classification, embedding generation, or response drafting. The AI never sees the original sensitive data.

Where it fits in the pipeline

PII redaction runs as the very first step of the AI pipeline, before classification, knowledge retrieval, or response generation. When a ticket arrives:

  1. The raw ticket content is passed through the PII redaction module
  2. Redacted content is used for all subsequent AI processing
  3. The original content remains stored in your database (encrypted), accessible only to authorized users
  4. When a response is generated, it references the redacted content — your team sees the full context when reviewing

Why this matters

Without PII redaction, sending support tickets to an AI provider means you're transferring your customers' personal information to a third party. This creates:

  • GDPR compliance risk (data transfers outside the EU)
  • CCPA/CPRA compliance issues (California privacy law)
  • Industry-specific violations (HIPAA for healthcare, PCI-DSS for payments)
  • Vendor risk assessment complications during procurement

With automatic redaction, none of these risks apply because the sensitive data never leaves your infrastructure. The AI only sees sanitized content, and your compliance obligations remain with you — not shared with or complicated by a third-party AI provider.

Combined with BYOK

PII redaction is most powerful when combined with BYOK. With both in place:

  • PII never reaches any external system
  • Even non-PII data goes only to your own AI provider account
  • You maintain complete control over your data pipeline

This defense-in-depth approach to data privacy is what makes Tickets Copilot suitable for organizations with strict compliance requirements — from healthcare to fintech to legal services.