---
title: issuerIdentifiers
framework: passkit
role: symbol
role_heading: Instance Property
path: passkit/pkidentitydocumentdescriptor/issueridentifiers
---

# issuerIdentifiers

A list of X.509 authority key identifiers which are accepted by the relying party.

## Declaration

```swift
var issuerIdentifiers: [Data] { get set }
```

## Discussion

Discussion An empty list means any document signer certificate is acceptable. warning: The number of issuer identifiers must not exceed 1,000 and the size of each identifier must not exceed 64 bytes. Your app will terminate if these conditions are not met.