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# issuerIdentifiers

A list of X.509 authority key identifiers your app accepts.

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

## Discussion

An empty list means any document signer certificate is acceptable.

> Warning: You can’t have more than 1,000 issuer identifiers, and the size of each identifier can’t exceed 64 bytes. If you don’t meet these conditions, your app terminates.

---

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