# CardHolderVerificationValue
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Card data parameters that are required to generate a cardholder verification value for the payment card.

## Contents
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 ** ApplicationTransactionCounter **   <a name="paymentcryptographydata-Type-CardHolderVerificationValue-ApplicationTransactionCounter"></a>
The transaction counter value that comes from a point of sale terminal.  
Type: String  
Length Constraints: Minimum length of 2. Maximum length of 4.  
Pattern: `[0-9a-fA-F]+`   
Required: Yes

 ** PanSequenceNumber **   <a name="paymentcryptographydata-Type-CardHolderVerificationValue-PanSequenceNumber"></a>
A number that identifies and differentiates payment cards with the same Primary Account Number (PAN).  
Type: String  
Length Constraints: Fixed length of 2.  
Pattern: `[0-9]+`   
Required: Yes

 ** UnpredictableNumber **   <a name="paymentcryptographydata-Type-CardHolderVerificationValue-UnpredictableNumber"></a>
A random number generated by the issuer.  
Type: String  
Length Constraints: Minimum length of 2. Maximum length of 8.  
Pattern: `[0-9a-fA-F]+`   
Required: Yes

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/payment-cryptography-data-2022-02-03/CardHolderVerificationValue) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/payment-cryptography-data-2022-02-03/CardHolderVerificationValue) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/payment-cryptography-data-2022-02-03/CardHolderVerificationValue)