---
title: seatAddition
framework: StoreKit
role: symbol
role_heading: Type Property
platforms: [iOS 27.3+, iPadOS 27.3+, Mac Catalyst 27.3+, macOS 27.3+, tvOS 27.3+, visionOS 27.3+, watchOS 27.3+]
path: storekit/transaction/additionaltransactionreason-swift.struct/seataddition
---

# seatAddition

A reason that indicates the group purchaser added seats to a multiseat subscription partway through the period.

## Declaration

```swift
static let seatAddition: Transaction.AdditionalTransactionReason
```

## Mentioned in

Managing the life cycle of multiseat subscriptions Testing multiseat subscriptions

## Discussion

Discussion Both the period’s original transaction and the transaction for the added seats have this reason. The raw value is SEAT_ADDITION, the same value that the App Store Server API uses.