---
title: primaryAccountIdentifier
framework: passkit
role: symbol
role_heading: Instance Property
path: passkit/pkaddpaymentpassrequestconfiguration/primaryaccountidentifier
---

# primaryAccountIdentifier

A primary account identifier, used to filter out pass libraries.

## Declaration

```swift
var primaryAccountIdentifier: String? { get set }
```

## Discussion

Discussion Users may have different passes installed on different paired devices (for example, on an iPhone and an Apple Watch). This property lets you filter out the devices that already contain a matching pass.

## See Also

### Filtering pass libraries

- [paymentNetwork](passkit/pkaddpaymentpassrequestconfiguration/paymentnetwork.md)
- [requiresFelicaSecureElement](passkit/pkaddpaymentpassrequestconfiguration/requiresfelicasecureelement.md)