# Identity & Compliance Specification

## Overview

This document specifies the identity verification (KYC/KYB) and compliance orchestration system for banking features.

## KYC/KYB Workflow Orchestration

### Workflow Stages

**1. Initial Registration**:
- User registration
- Basic information collection
- Terms acceptance

**2. Identity Verification**:
- Document upload (ID, proof of address)
- Biometric verification (if required)
- Liveness check

**3. Risk Assessment**:
- Sanctions screening
- PEP screening
- Risk scoring

**4. Approval/Rejection**:
- Automated approval (low risk)
- Manual review (medium/high risk)
- Rejection with reasons

### Workflow State Machine

```
[Registered] → [Identity Verification] → [Risk Assessment] → [Approved/Rejected]
                                              ↓
                                         [Manual Review]
```

## Sanctions/PEP Screening Integration

### Screening Providers

**Options**:
- WorldCheck
- Dow Jones Risk & Compliance
- Chainalysis
- Others

### Screening Process

**1. Data Collection**:
- Name, date of birth, nationality
- Address information
- Associated addresses (blockchain addresses)

**2. Screening Check**:
- Sanctions lists (OFAC, UN, EU, etc.)
- PEP lists (politically exposed persons)
- Adverse media screening

**3. Match Resolution**:
- Automated false positive filtering
- Manual review for potential matches
- Risk scoring based on match confidence

### Screening Result

```json
{
  "user_id": "uuid",
  "screening_status": "cleared",
  "matches": [],
  "risk_score": 0.1,
  "screened_at": "2024-01-01T00:00:00Z",
  "next_screening": "2025-01-01T00:00:00Z"
}
```

## Risk Tier Assignment

### Risk Tiers

**Tier 1 - Low Risk**:
- Verified identity
- No sanctions/PEP matches
- Low transaction volume
- Limits: Standard limits

**Tier 2 - Medium Risk**:
- Verified identity
- Minor concerns (e.g., high-risk country)
- Medium transaction volume
- Limits: Reduced limits, additional monitoring

**Tier 3 - High Risk**:
- Unverified or incomplete verification
- Sanctions/PEP matches
- High transaction volume
- Limits: Very restricted or blocked

### Risk Scoring

**Factors**:
- Identity verification status
- Sanctions/PEP screening results
- Transaction patterns
- Geographic risk
- Source of funds

**Score Range**: 0.0 (low risk) to 1.0 (high risk)

## Limit Management

### Limit Types

**Transaction Limits**:
- Daily transaction limit
- Monthly transaction limit
- Single transaction limit

**Account Limits**:
- Maximum balance
- Withdrawal limits

### Limit Enforcement

**Real-time Checks**:
- Check limits before transaction
- Reject if limit exceeded
- Provide limit status to user

**Dynamic Limits**:
- Adjust limits based on risk tier
- Increase limits with step-up verification
- Temporary limit increases (pending approval)

## Step-Up Verification

### Trigger Conditions

**Triggers**:
- Transaction exceeds current tier limits
- Suspicious activity detected
- User request
- Regulatory requirement

### Verification Levels

**Level 1**: Basic KYC (standard)
**Level 2**: Enhanced due diligence (EDD)
**Level 3**: Institutional/KYB verification

### Step-Up Process

1. Notify user of requirement
2. Collect additional documentation
3. Enhanced screening
4. Review and approval
5. Update risk tier and limits

## Integration Points

### Identity Provider Integration

**Providers**:
- Jumio
- Onfido
- Sumsub
- Others

**Integration Pattern**:
- API integration
- Webhook callbacks for status updates
- Document storage

### Compliance System Integration

**Systems**:
- Transaction monitoring
- Reporting systems
- Audit systems

## Data Privacy

### PII Handling

**Storage**: Encrypted storage
**Access**: Role-based access control
**Retention**: Per regulatory requirements
**Deletion**: Right to deletion support

## References

- Account & Ledger: See `account-ledger.md`
- Compliance Dashboards: See `compliance-dashboards.md`
- Security: See `../security/privacy-controls.md`