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# PaymentCardTransactionRequest.TransactionAmountDescription

Values that provide additional information about the transaction amount.

```
enum TransactionAmountDescription
```

## Overview

This information appears below the central transaction details in the system UI.
Each case applies to specific types of transactions, such as a purchase or refund. Check the [`PaymentCardTransactionRequest.TransactionAmountDescription`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionAmountDescription)
values description.
If an incompatible transaction type is requested or the value(s) are out of range, it will simply not appear in the system UI.

## Topics

### Enumeration Cases

[`case installment(PaymentCardTransactionRequest.PaymentCycle, amount: Decimal, payments: Int)`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionAmountDescription/installment(_:amount:payments:))

The total amount authorized upfront. The customer pays the specified amount on each payment cycle.
Only allowed for [`PaymentCardTransactionRequest.TransactionType.purchase`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionType/purchase)

[`case membership(PaymentCardTransactionRequest.PaymentCycle)`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionAmountDescription/membership(_:))

Charges the customer the amount shown for each payment cycle.
Only allowed for [`PaymentCardTransactionRequest.TransactionType.purchase`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionType/purchase)

[`case preauthorization`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionAmountDescription/preauthorization)

Places a temporary hold on the customer’s account.
Only allowed for [`PaymentCardTransactionRequest.TransactionType.purchase`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionType/purchase)

[`case preauthorizationAmount(Decimal)`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionAmountDescription/preauthorizationAmount(_:))

Places a temporary hold on the customer’s account for the specified amount.
Only allowed for [`PaymentCardTransactionRequest.TransactionType.purchase`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionType/purchase)

[`case preauthorizationRelease`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionAmountDescription/preauthorizationRelease)

Releases the amount shown from the temporary deposit.
Only allowed for [`PaymentCardTransactionRequest.TransactionType.refund`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionType/refund)

[`case surchargeAmount(Decimal)`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionAmountDescription/surchargeAmount(_:))

The transaction’s surcharge amount.
Only allowed for [`PaymentCardTransactionRequest.TransactionType.purchase`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionType/purchase)

[`case surchargePercent(Double)`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionAmountDescription/surchargePercent(_:))

The maximum surcharge percentage the payment processor may apply to the transaction.
Only allowed for [`PaymentCardTransactionRequest.TransactionType.purchase`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionType/purchase)

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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