---
title: SerialNumbers
framework: walletpasses
role: symbol
role_heading: Object
path: walletpasses/serialnumbers
---

# SerialNumbers

An object that contains serial numbers for the updatable passes on a device.

## Declaration

```data
object SerialNumbers
```

## Properties

serialNumbers: An array of serial numbers for the updated passes. lastUpdated: A developer-defined string that contains a tag that indicates the modification time for the returned passes. You use the value of this key for the previousLastUpdated parameter of Get the List of Updatable Passes to return passes modified after the represented date and time.

## Mentioned in

Adding a Web Service to Update Passes

## See Also

### Pass updates

- [Adding a Web Service to Update Passes](walletpasses/adding-a-web-service-to-update-passes.md)
- [Register a Pass for Update Notifications](walletpasses/register-a-pass-for-update-notifications.md)
- [Get the List of Updatable Passes](walletpasses/get-the-list-of-updatable-passes.md)
- [Send an Updated Pass](walletpasses/send-an-updated-pass.md)
- [Unregister a Pass for Update Notifications](walletpasses/unregister-a-pass-for-update-notifications.md)
- [Log a Message](walletpasses/log-a-message.md)
- [PushToken](walletpasses/pushtoken.md)
- [LogEntries](walletpasses/logentries.md)