AWS SDK Version 3 for .NET
API Reference

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Requests an ACM Certificate for use with other AWS services. To request an ACM Certificate, you must specify the fully qualified domain name (FQDN) for your site in the DomainName parameter. You can also specify additional FQDNs in the SubjectAlternativeNames parameter if users can reach your site by using other names.

For each domain name you specify, email is sent to the domain owner to request approval to issue the certificate. Email is sent to three registered contact addresses in the WHOIS database and to five common system administration addresses formed from the DomainName you enter or the optional ValidationDomain parameter. For more information, see Validate Domain Ownership.

After receiving approval from the domain owner, the ACM Certificate is issued. For more information, see the AWS Certificate Manager User Guide.


For .NET Core and PCL this operation is only available in asynchronous form. Please refer to RequestCertificateAsync.

Namespace: Amazon.CertificateManager
Assembly: AWSSDK.CertificateManager.dll
Version: 3.x.y.z


public abstract RequestCertificateResponse RequestCertificate(
         String domainName
Type: System.String

Fully qualified domain name (FQDN), such as, of the site that you want to secure with an ACM Certificate. Use an asterisk (*) to create a wildcard certificate that protects several sites in the same domain. For example, * protects,, and The first domain name you enter cannot exceed 63 octets, including periods. Each subsequent Subject Alternative Name (SAN), however, can be up to 253 octets in length.

Return Value
The response from the RequestCertificate service method, as returned by CertificateManager.


InvalidDomainValidationOptionsException One or more values in the DomainValidationOption structure is incorrect.
LimitExceededException An ACM limit has been exceeded. For example, you may have input more domains than are allowed or you've requested too many certificates for your account. See the exception message returned by ACM to determine which limit you have violated. For more information about ACM limits, see the Limits topic.

Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms

See Also