# PrevalidationOptions
<a name="API_PrevalidationOptions"></a>

Specifies prevalidation options for domain validation.

## Contents
<a name="API_PrevalidationOptions_Contents"></a>

**Note**  
In the following list, the required parameters are described first.

**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** DnsPrevalidation **   <a name="ACM-Type-PrevalidationOptions-DnsPrevalidation"></a>
DNS-based prevalidation options.  
Type: [DnsPrevalidationOptions](API_DnsPrevalidationOptions.md) object  
Required: No

## See Also
<a name="API_PrevalidationOptions_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/acm-2015-12-08/PrevalidationOptions) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/acm-2015-12-08/PrevalidationOptions) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/acm-2015-12-08/PrevalidationOptions)