diff --git a/epp-client-macros/src/lib.rs b/epp-client-macros/src/lib.rs
index e97daf5..4d17c6b 100644
--- a/epp-client-macros/src/lib.rs
+++ b/epp-client-macros/src/lib.rs
@@ -51,59 +51,3 @@ pub fn element_name_derive(input: TokenStream) -> TokenStream {
 
     element_name_macro(&ast)
 }
-
-fn epp_request_macro(ast: &syn::DeriveInput) -> proc_macro::TokenStream {
-    let name = &ast.ident;
-    let attr = &ast.attrs[0];
-    let mut response_type: Option<syn::Ident> = None;
-    let (impl_generics, type_generics, _) = &ast.generics.split_for_impl();
-
-    if attr.path.is_ident("response") {
-        match attr.parse_meta() {
-            Ok(syn::Meta::List(meta)) => {
-                let item = &meta.nested[0];
-                match item {
-                    syn::NestedMeta::Meta(syn::Meta::Path(p)) => {
-                        response_type = Some(p.get_ident().unwrap().clone());
-                    }
-                    _ => panic!("Failed to parse args for epp_types"),
-                }
-            }
-            _ => panic!("Failed to parse args for epp_types"),
-        };
-    }
-
-    if let Some(resp) = response_type {
-        let implement = quote::quote! {
-            impl #impl_generics EppRequest for #name #type_generics {
-                type Output = #resp;
-
-                fn deserialize_response(&self, epp_xml: &str) -> Result<Self::Output, Box<dyn std::error::Error>> {
-                    match Self::Output::deserialize(epp_xml) {
-                        Ok(v) => Ok(v),
-                        Err(e) => Err(format!("epp-client: Deserialization error: {}", e).into()),
-                    }
-                }
-
-                fn serialize_request(&self) -> Result<String, Box<dyn std::error::Error>> {
-                    match &self.0.serialize() {
-                        Ok(serialized) => Ok(serialized.to_string()),
-                        Err(e) => Err(format!("epp-client: Serialization error: {}", e).into()),
-                    }
-                }
-            }
-        };
-        implement.into()
-    } else {
-        panic!(
-            "response() needs 1 argument, a response type that implements epp_client::epp::xml::EppXml"
-        );
-    }
-}
-
-#[proc_macro_derive(EppRequest, attributes(response))]
-pub fn epp_request_derive(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
-    let ast = syn::parse(input).expect("Error while parsing EppTransaction macro input");
-
-    epp_request_macro(&ast)
-}
diff --git a/epp-client/src/connection/client.rs b/epp-client/src/connection/client.rs
index 90b307e..4227a5c 100644
--- a/epp-client/src/connection/client.rs
+++ b/epp-client/src/connection/client.rs
@@ -160,21 +160,14 @@ impl EppClient {
 
     pub async fn transact_new<T: EppRequest + Debug>(
         &mut self,
-        request: &T,
-    ) -> Result<<T as EppRequest>::Output, error::Error> {
-        let epp_xml = request.serialize_request()?;
+        request: T,
+    ) -> Result<<<T as EppRequest>::Response as EppXml>::Output, error::Error> {
+        let epp_xml = request.serialize()?;
+        println!("{}", epp_xml);
 
         let response = self.connection.transact(&epp_xml).await?;
 
-        let status = EppCommandResponse::deserialize(&response)?;
-
-        if status.data.result.code < 2000 {
-            let response = request.deserialize_response(&response)?;
-            Ok(response)
-        } else {
-            let epp_error = EppCommandResponseError::deserialize(&response)?;
-            Err(error::Error::EppCommandError(epp_error))
-        }
+        T::deserialize(&response)
     }
 
     /// Fetches the username used in the registry connection
diff --git a/epp-client/src/domain/check.rs b/epp-client/src/domain/check.rs
index 3fb5819..438ca94 100644
--- a/epp-client/src/domain/check.rs
+++ b/epp-client/src/domain/check.rs
@@ -1,17 +1,116 @@
 use epp_client_macros::*;
 
-use crate::epp::request::domain::check::EppDomainCheck;
-use crate::epp::request::EppRequest;
+use serde::{de::DeserializeOwned, Deserialize, Serialize};
+use std::fmt::Debug;
+
+use crate::epp::object::{ElementName, EppObject, Extension, StringValue};
+use crate::epp::request::{CommandWithExtension, EppRequest};
 use crate::epp::response::domain::check::EppDomainCheckResponse;
-use crate::epp::xml::EppXml;
+use crate::epp::xml::EPP_DOMAIN_XMLNS;
 
-#[derive(EppRequest, Debug)]
-#[response(EppDomainCheckResponse)]
-pub struct Request(EppDomainCheck);
+type EppDomainCheck<E> = EppObject<CommandWithExtension<DomainCheck, E>>;
 
-impl Request {
-    /// Creates a new Request for a domain check
-    pub fn new(domains: Vec<&str>, client_tr_id: &str) -> Request {
-        Request(EppDomainCheck::new(domains, client_tr_id))
+/// Type that represents the &lt;epp&gt; request for domain &lt;check&gt; command
+///
+/// ## Usage
+///
+/// ```no_run
+/// use std::collections::HashMap;
+///
+/// use epp_client::config::{EppClientConfig, EppClientConnection};
+/// use epp_client::EppClient;
+/// use epp_client::epp::object::NoExtension;
+/// use epp_client::domain;
+/// use epp_client::epp::generate_client_tr_id;
+///
+/// #[tokio::main]
+/// async fn main() {
+///     // Create a config
+///     let mut registry: HashMap<String, EppClientConnection> = HashMap::new();
+///     registry.insert(
+///         "registry_name".to_owned(),
+///         EppClientConnection {
+///             host: "example.com".to_owned(),
+///             port: 700,
+///             username: "username".to_owned(),
+///             password: "password".to_owned(),
+///             ext_uris: None,
+///             tls_files: None,
+///         },
+///     );
+///     let config = EppClientConfig { registry };
+///
+///     // Create an instance of EppClient, passing the config and the registry you want to connect to
+///     let mut client = match EppClient::new(&config, "registry_name").await {
+///         Ok(client) => client,
+///         Err(e) => panic!("Failed to create EppClient: {}",  e)
+///     };
+///
+///     // Create an epp_client::domain::check::Request instance
+///     let domain_check = domain::check::Request::<NoExtension>::new(
+///         vec!["eppdev.com", "eppdev.net"],
+///         None,
+///         generate_client_tr_id(&client).as_str(),
+///     );
+///
+///     // send it to the registry and receive a response of type EppDomainCheckResponse
+///     let response = client.transact_new(domain_check).await.unwrap();
+///
+///     println!("{:?}", response);
+///
+///     client.logout().await.unwrap();
+/// }
+/// ```
+#[derive(Debug)]
+pub struct Request<E: ElementName + Serialize + DeserializeOwned + Debug>(EppDomainCheck<E>);
+
+impl<E: ElementName + Serialize + DeserializeOwned + Debug> EppRequest for Request<E> {
+    type Request = EppDomainCheck<E>;
+    type Response = EppDomainCheckResponse;
+
+    fn as_epp_object(&self) -> &Self::Request {
+        &self.0
+    }
+}
+
+#[derive(Serialize, Deserialize, Debug, ElementName)]
+#[element_name(name = "check")]
+/// Type for EPP XML &lt;check&gt; command for domains
+pub struct DomainCheck {
+    /// The object holding the list of domains to be checked
+    #[serde(rename = "domain:check", alias = "check")]
+    list: DomainList,
+}
+
+/// Type for &lt;name&gt; elements under the domain &lt;check&gt; tag
+#[derive(Serialize, Deserialize, Debug)]
+pub struct DomainList {
+    #[serde(rename = "xmlns:domain", alias = "xmlns")]
+    /// XML namespace for domain commands
+    xmlns: String,
+    #[serde(rename = "domain:name", alias = "name")]
+    /// List of domains to be checked for availability
+    domains: Vec<StringValue>,
+}
+
+impl<E: ElementName + Serialize + DeserializeOwned + Debug> Request<E> {
+    pub fn new(
+        domains: impl IntoIterator<Item = impl AsRef<str>>,
+        extension: Option<E>,
+        client_tr_id: &str,
+    ) -> Self {
+        Self(EppObject::build(CommandWithExtension::<_, _> {
+            command: DomainCheck {
+                list: DomainList {
+                    xmlns: EPP_DOMAIN_XMLNS.to_string(),
+                    domains: domains
+                        .into_iter()
+                        .map(|d| d.as_ref().into())
+                        .collect::<Vec<StringValue>>(),
+                },
+            },
+            extension: extension.map(|ext| Extension { data: ext }),
+            client_tr_id: client_tr_id.into(),
+        }))
     }
 }
diff --git a/epp-client/src/epp.rs b/epp-client/src/epp.rs
index 63b7046..cf156ca 100644
--- a/epp-client/src/epp.rs
+++ b/epp-client/src/epp.rs
@@ -1,5 +1,6 @@
 //! Types for EPP requests and responses
 
+pub mod ext;
 pub mod object;
 pub mod request;
 pub mod response;
diff --git a/epp-client/src/epp/ext.rs b/epp-client/src/epp/ext.rs
new file mode 100644
index 0000000..f765556
--- /dev/null
+++ b/epp-client/src/epp/ext.rs
@@ -0,0 +1 @@
+pub mod namestore;
diff --git a/epp-client/src/epp/ext/namestore.rs b/epp-client/src/epp/ext/namestore.rs
new file mode 100644
index 0000000..66576a7
--- /dev/null
+++ b/epp-client/src/epp/ext/namestore.rs
@@ -0,0 +1,2 @@
+pub mod check;
+pub mod xml;
diff --git a/epp-client/src/epp/ext/namestore/check.rs b/epp-client/src/epp/ext/namestore/check.rs
new file mode 100644
index 0000000..7d78b56
--- /dev/null
+++ b/epp-client/src/epp/ext/namestore/check.rs
@@ -0,0 +1,23 @@
+use epp_client_macros::*;
+
+use crate::epp::ext::namestore::xml::EPP_DOMAIN_NAMESTORE_EXT_XMLNS;
+use crate::epp::object::{ElementName, StringValue};
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug, ElementName)]
+#[element_name(name = "namestoreExt:namestoreExt")]
+pub struct NamestoreCheck {
+    #[serde(rename = "xmlns:namestoreExt", alias = "xmlns")]
+    xmlns: String,
+    #[serde(rename = "namestoreExt:subProduct", alias = "subProduct")]
+    sub_product: StringValue,
+}
+
+impl NamestoreCheck {
+    pub fn new(sub_product: &str) -> Self {
+        Self {
+            xmlns: EPP_DOMAIN_NAMESTORE_EXT_XMLNS.into(),
+            sub_product: sub_product.into(),
+        }
+    }
+}
diff --git a/epp-client/src/epp/ext/namestore/xml.rs b/epp-client/src/epp/ext/namestore/xml.rs
new file mode 100644
index 0000000..cac5fd1
--- /dev/null
+++ b/epp-client/src/epp/ext/namestore/xml.rs
@@ -0,0 +1 @@
+pub const EPP_DOMAIN_NAMESTORE_EXT_XMLNS: &str = "http://www.verisign-grs.com/epp/namestoreExt-1.1";
diff --git a/epp-client/src/epp/object.rs b/epp-client/src/epp/object.rs
index 477c9c5..7c43565 100644
--- a/epp-client/src/epp/object.rs
+++ b/epp-client/src/epp/object.rs
@@ -39,7 +39,7 @@ pub trait ElementName {
 #[derive(Serialize, Deserialize, Debug, PartialEq, ElementName)]
 #[element_name(name = "empty")]
 /// An empty placeholder tag. To be refactored to something more compliant later.
-pub struct EmptyTag;
+pub struct NoExtension;
 
 /// An EPP XML Document that is used either as an EPP XML request or
 /// an EPP XML response
diff --git a/epp-client/src/epp/request.rs b/epp-client/src/epp/request.rs
index e8c1bd9..2a75677 100644
--- a/epp-client/src/epp/request.rs
+++ b/epp-client/src/epp/request.rs
@@ -13,27 +13,45 @@ use std::fmt::Debug;
 use std::time::SystemTime;
 
 use crate::epp::object::{
-    ElementName, EmptyTag, EppObject, Extension, Options, ServiceExtension, Services, StringValue,
+    ElementName, EppObject, Extension, NoExtension, Options, ServiceExtension, Services,
+    StringValue,
 };
+use crate::epp::response::{CommandResponseStatus, EppCommandResponse};
 use crate::epp::xml::{
     EppXml, EPP_CONTACT_XMLNS, EPP_DOMAIN_XMLNS, EPP_HOST_XMLNS, EPP_LANG, EPP_VERSION,
 };
 
-/// Trait to set correct value for xml tags when tags are being generated from generic types
+/// Trait to handle serialization and de serialization to required request and response types
 pub trait EppRequest {
-    type Output: EppXml + Debug;
+    type Request: EppXml + Debug;
+    type Response: EppXml + Serialize + Debug;
 
-    fn deserialize_response(
-        &self,
+    fn as_epp_object(&self) -> &Self::Request;
+
+    fn serialize(&self) -> Result<String, Box<dyn Error>> {
+        self.as_epp_object().serialize()
+    }
+
+    fn deserialize(
         epp_xml: &str,
-    ) -> Result<Self::Output, Box<dyn std::error::Error>>;
+    ) -> Result<<Self::Response as EppXml>::Output, crate::error::Error> {
+        let status = <EppCommandResponse as EppXml>::deserialize(epp_xml)?;
 
-    fn serialize_request(&self) -> Result<String, Box<dyn std::error::Error>>;
+        match status.data.result.code {
+            0..=2000 => Self::Response::deserialize(epp_xml),
+            _ => Err(crate::error::Error::EppCommandError(EppObject::build(
+                CommandResponseStatus {
+                    result: status.data.result,
+                    tr_ids: status.data.tr_ids,
+                },
+            ))),
+        }
+    }
 }
 
 /// Type corresponding to the &lt;command&gt; tag in an EPP XML request
 /// without an &lt;extension&gt; tag
-pub type Command<T> = CommandWithExtension<T, EmptyTag>;
+pub type Command<T> = CommandWithExtension<T, NoExtension>;
 
 /// The EPP Hello request
 pub type EppHello = EppObject<Hello>;
diff --git a/epp-client/src/epp/response.rs b/epp-client/src/epp/response.rs
index 25bde4a..378b200 100644
--- a/epp-client/src/epp/response.rs
+++ b/epp-client/src/epp/response.rs
@@ -10,11 +10,12 @@ use serde::{Deserialize, Deserializer, Serialize};
 use std::fmt::Debug;
 
 use crate::epp::object::{
-    ElementName, EmptyTag, EppObject, Extension, Options, ServiceExtension, Services, StringValue,
+    ElementName, EppObject, Extension, NoExtension, Options, ServiceExtension, Services,
+    StringValue,
 };
 
 /// Type corresponding to the &lt;response&gt; tag in an EPP response without an &lt;extension&gt; section
-pub type CommandResponse<T> = CommandResponseWithExtension<T, EmptyTag>;
+pub type CommandResponse<T> = CommandResponseWithExtension<T, NoExtension>;
 
 /// The EPP Greeting that is received on a successful connection and in response to an EPP hello
 pub type EppGreeting = EppObject<Greeting>;
diff --git a/epp-client/src/epp/response/domain/rgp/request.rs b/epp-client/src/epp/response/domain/rgp/request.rs
index 3582897..e888b30 100644
--- a/epp-client/src/epp/response/domain/rgp/request.rs
+++ b/epp-client/src/epp/response/domain/rgp/request.rs
@@ -1,12 +1,12 @@
 use epp_client_macros::*;
 
-use crate::epp::object::{ElementName, EmptyTag, EppObject};
+use crate::epp::object::{ElementName, EppObject, NoExtension};
 use crate::epp::response::CommandResponseWithExtension;
 use serde::{Deserialize, Serialize};
 
 /// Type that represents the &lt;epp&gt; tag for the EPP XML rgp restore request response
 pub type EppDomainRgpRestoreRequestResponse =
-    EppObject<CommandResponseWithExtension<EmptyTag, RgpRequestResult>>;
+    EppObject<CommandResponseWithExtension<NoExtension, RgpRequestResult>>;
 
 /// Type that represents the &lt;rgpStatus&gt; tag for domain rgp restore request response
 #[derive(Serialize, Deserialize, Debug)]
diff --git a/epp-client/src/tests/mod.rs b/epp-client/src/tests/mod.rs
index 9a5aa16..57d9bed 100644
--- a/epp-client/src/tests/mod.rs
+++ b/epp-client/src/tests/mod.rs
@@ -1,7 +1,6 @@
 //! Module for automated tests
 
 pub mod de;
-pub mod int;
 pub mod se;
 
 use regex::Regex;
diff --git a/epp-client/src/tests/se.rs b/epp-client/src/tests/se.rs
index 8850584..2896176 100644
--- a/epp-client/src/tests/se.rs
+++ b/epp-client/src/tests/se.rs
@@ -4,11 +4,12 @@ mod request {
     use super::super::get_xml;
     use super::super::CLTRID;
     use crate::domain;
+    use crate::epp::ext::namestore::check::NamestoreCheck;
     use crate::epp::object::data::{
         Address, ContactStatus, DomainAuthInfo, DomainContact, DomainStatus, HostAddr, HostAttr,
         HostStatus, Phone, PostalInfo,
     };
-    use crate::epp::object::StringValueTrait;
+    use crate::epp::object::NoExtension;
     use crate::epp::request::{EppHello, EppLogin, EppLogout, EppRequest};
     use crate::epp::xml::EppXml;
     use crate::epp::*;
@@ -145,9 +146,30 @@ mod request {
     fn wrapped_domain_check() {
         let xml = get_xml("request/domain/check.xml").unwrap();
 
-        let object = domain::check::Request::new(vec!["eppdev.com", "eppdev.net"], CLTRID);
+        let object = domain::check::Request::<NoExtension>::new(
+            vec!["eppdev.com", "eppdev.net"],
+            None,
+            CLTRID,
+        );
 
-        let serialized = object.serialize_request().unwrap();
+        let serialized = object.serialize().unwrap();
+
+        assert_eq!(xml, serialized);
+    }
+
+    #[test]
+    fn domain_check_namestore() {
+        let xml = get_xml("request/domain/ext/namestore/check.xml").unwrap();
+
+        let ext = NamestoreCheck::new("dotCC");
+
+        let object = domain::check::Request::<NamestoreCheck>::new(
+            vec!["eppdev.com", "eppdev.net"],
+            Some(ext),
+            CLTRID,
+        );
+
+        let serialized = object.serialize().unwrap();
 
         assert_eq!(xml, serialized);
     }
diff --git a/epp-client/test/resources/request/domain/ext/namestore/check.xml b/epp-client/test/resources/request/domain/ext/namestore/check.xml
new file mode 100644
index 0000000..669a757
--- /dev/null
+++ b/epp-client/test/resources/request/domain/ext/namestore/check.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+    <command>
+        <check>
+            <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+                <domain:name>eppdev.com</domain:name>
+                <domain:name>eppdev.net</domain:name>
+            </domain:check>
+        </check>
+        <extension>
+            <namestoreExt:namestoreExt xmlns:namestoreExt="http://www.verisign-grs.com/epp/namestoreExt-1.1">
+                <namestoreExt:subProduct>dotCC</namestoreExt:subProduct>
+            </namestoreExt:namestoreExt>
+        </extension>
+        <clTRID>cltrid:1626454866</clTRID>
+    </command>
+</epp>
\ No newline at end of file
diff --git a/epp-client/src/tests/int.rs b/epp-client/tests/integration_test.rs
similarity index 60%
rename from epp-client/src/tests/int.rs
rename to epp-client/tests/integration_test.rs
index 387d5fe..d3af059 100644
--- a/epp-client/src/tests/int.rs
+++ b/epp-client/tests/integration_test.rs
@@ -1,11 +1,12 @@
-use super::CLTRID;
-use super::RESOURCES_DIR;
-use crate::config::EppClientConfig;
-use crate::domain;
-use crate::EppClient;
+use epp_client::config::EppClientConfig;
+use epp_client::domain;
+use epp_client::epp::object::NoExtension;
+use epp_client::EppClient;
 use std::fs;
 use std::path::Path;
-use toml;
+
+const RESOURCES_DIR: &str = "./test/resources";
+const CLTRID: &str = "cltrid:1626454866";
 
 #[tokio::test]
 #[ignore]
@@ -22,9 +23,11 @@ async fn domain_check() {
     };
 
     let domains = vec!["eppdev.com", "eppdev.net"];
-    let request = domain::check::Request::new(domains, CLTRID);
+    let request = domain::check::Request::<NoExtension>::new(domains, None, CLTRID);
 
-    client.transact_new(&request).await.unwrap();
+    let response = client.transact_new(request).await.unwrap();
+
+    println!("{:?}", response);
 
     client.logout().await.unwrap();
 }