AWS SDK Version 3 for .NET
API Reference

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Container for the parameters to the RequestCertificate operation. 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.

Inheritance Hierarchy


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


public class RequestCertificateRequest : AmazonCertificateManagerRequest

The RequestCertificateRequest type exposes the following members


Public Method RequestCertificateRequest()


Public Property DomainName System.String

Gets and sets the property DomainName.

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.

Public Property DomainValidationOptions System.Collections.Generic.List<Amazon.CertificateManager.Model.DomainValidationOption>

Gets and sets the property DomainValidationOptions.

The domain name that you want ACM to use to send you emails so that you can validate domain ownership.

Public Property IdempotencyToken System.String

Gets and sets the property IdempotencyToken.

Customer chosen string that can be used to distinguish between calls to RequestCertificate. Idempotency tokens time out after one hour. Therefore, if you call RequestCertificate multiple times with the same idempotency token within one hour, ACM recognizes that you are requesting only one certificate and will issue only one. If you change the idempotency token for each call, ACM recognizes that you are requesting multiple certificates.

Public Property SubjectAlternativeNames System.Collections.Generic.List<System.String>

Gets and sets the property SubjectAlternativeNames.

Additional FQDNs to be included in the Subject Alternative Name extension of the ACM Certificate. For example, add the name to a certificate for which the DomainName field is if users can reach your site by using either name. The maximum number of domain names that you can add to an ACM Certificate is 100. However, the initial limit is 10 domain names. If you need more than 10 names, you must request a limit increase. For more information, see Limits.

The maximum length of a SAN DNS name is 253 octets. The name is made up of multiple labels separated by periods. No label can be longer than 63 octets. Consider the following examples:

  • (63 octets).(63 octets).(63 octets).(61 octets) is legal because the total length is 253 octets (63+1+63+1+63+1+61) and no label exceeds 63 octets.

  • (64 octets).(63 octets).(63 octets).(61 octets) is not legal because the total length exceeds 253 octets (64+1+63+1+63+1+61) and the first label exceeds 63 octets.

  • (63 octets).(63 octets).(63 octets).(62 octets) is not legal because the total length of the DNS name (63+1+63+1+63+1+62) exceeds 253 octets.

Public Property ValidationMethod Amazon.CertificateManager.ValidationMethod

Gets and sets the property ValidationMethod.

The method you want to use to validate your domain.

Version Information

.NET Standard:
Supported in: 1.3

.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