---
title: "SecCertificateCopyNormalizedIssuerSequence(_:)"
framework: security
role: symbol
role_heading: Function
path: "security/seccertificatecopynormalizedissuersequence(_:)"
---

# SecCertificateCopyNormalizedIssuerSequence(_:)

Retrieves the normalized issuer sequence from a certificate.

## Declaration

```swift
func SecCertificateCopyNormalizedIssuerSequence(_ certificate: SecCertificate) -> CFData?
```

## Parameters

- `certificate`: The certificate from which to retrieve the data.

## Return Value

Return Value A data object containing the sequence or NULL on error. In Objective-C, free this object with a call to the CFRelease function when you are done with it.