diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9fe632a..4a1051e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## [Unreleased]
 
+## [1.2.0] - 2024-08-26
+
+- Removes the requirement to send installation id to register signup, login and payment
+
 ## [1.1.0] - 2024-07-24
 
 - Add support to passing request_token and occurred_at to #register_feedback
diff --git a/Gemfile.lock b/Gemfile.lock
index 2b3346c..92282f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    incognia_api (1.1.0)
+    incognia_api (1.2.0)
       faraday (~> 1.10)
       faraday_middleware (~> 1.2)
 
diff --git a/README.md b/README.md
index 2ccd731..3dc6cc8 100644
--- a/README.md
+++ b/README.md
@@ -49,14 +49,14 @@ For sandbox credentials, refer to the [API testing guide]().
 
 ### Registering a Signup
 
-This method registers a new signup for the given installation and address, returning a signup assessment, containing the risk assessment and supporting evidence:
+This method registers a new signup for the given request token and address, returning a signup assessment, containing the risk assessment and supporting evidence:
 
 ```ruby
 address = Incognia::Address.new(line: "West 34th Street, New York City, NY 10001")
-installation_id = "WlMksW+jh5GPhqWBorsV8yDihoSHHpmt+DpjJ7eYxpHhuO/5tuHTuA..."
+request_token = "WlMksW+jh5GPhqWBorsV8yDihoSHHpmt+DpjJ7eYxpHhuO/5tuHTuA..."
 
 assessment = api.register_signup(
-  installation_id: installation_id,
+  request_token: request_token,
   address: address
 )
 
@@ -68,11 +68,11 @@ It also supports optional parameters, for example:
 
 ```ruby
 address = Incognia::Address.new(line: "West 34th Street, New York City, NY 10001")
-installation_id = "WlMksW+jh5GPhqWBorsV8yDihoSHHpmt+DpjJ7eYxpHhuO/5tuHTuA..."
+request_token = "WlMksW+jh5GPhqWBorsV8yDihoSHHpmt+DpjJ7eYxpHhuO/5tuHTuA..."
 external_id = "7b02736a-7718-4b83-8982-f68fb6f501fa"
 
 assessment = api.register_signup(
-  installation_id: installation_id,
+  request_token: request_token,
   address: address,
   external_id: external_id
 )
@@ -82,14 +82,14 @@ assessment = api.register_signup(
 
 ### Registering a Login
 
-This method registers a new login for the given installation and account, returning a login assessment, containing the risk assessment and supporting evidence:
+This method registers a new login for the given request token and account, returning a login assessment, containing the risk assessment and supporting evidence:
 
 ```ruby
-installation_id = "WlMksW+jh5GPhqWBorsV8yDihoSHHpmt+DpjJ7eYxpHhuO/5tuHTuA..."
+request_token = "WlMksW+jh5GPhqWBorsV8yDihoSHHpmt+DpjJ7eYxpHhuO/5tuHTuA..."
 account_id = 'account-identifier-123'
 
 assessment = api.register_login(
-  installation_id: installation_id,
+  request_token: request_token,
   account_id: account_id,
 )
 
@@ -100,12 +100,12 @@ assessment = api.register_login(
 It also supports optional parameters, for example:
 
 ```ruby
-installation_id = "WlMksW+jh5GPhqWBorsV8yDihoSHHpmt+DpjJ7eYxpHhuO/5tuHTuA..."
+request_token = "WlMksW+jh5GPhqWBorsV8yDihoSHHpmt+DpjJ7eYxpHhuO/5tuHTuA..."
 account_id = 'account-identifier-123'
 external_id = 'some-external-identifier'
 
 assessment = api.register_login(
-  installation_id: installation_id,
+  request_token: request_token,
   account_id: account_id,
   external_id: external_id,
   eval: false # can be used to register a new login without evaluating it
@@ -116,12 +116,12 @@ assessment = api.register_login(
 
 ### Registering Payment
 
-This method registers a new payment for the given installation and account, returning a `hash`,
+This method registers a new payment for the given request token and account, returning a `hash`,
 containing the risk assessment and supporting evidence.
 
 ```ruby
 assessment = api.register_payment(
-  installation_id: 'installation-id',
+  request_token: 'request-token',
   account_id: 'account-id'
 )
 
@@ -181,7 +181,7 @@ payment_methods = [
 ]
 
 assessment = api.register_payment(
-  installation_id: 'installation-id',
+  request_token: 'request-token',
   account_id: 'account-id',
   external_id: 'external-id',
   addresses: addresses,
@@ -202,14 +202,14 @@ The `expires_at` argument should be a _Time_, _DateTime_ or an date in **RFC 333
 
 
 ```ruby
-installation_id = 'installation-id'
+request_token = 'request-token'
 account_id = 'account-id'
 occurred_at = DateTime.parse('2024-07-22T15:20:00Z')
 
 success = api.register_feedback(
   event: Incognia::Constants::FeedbackEvent::ACCOUNT_TAKEOVER,
   occurred_at: occurred_at,
-  installation_id: installation_id,
+  request_token: request_token,
   account_id: account_id
 )
 
@@ -222,7 +222,7 @@ For custom fraud, set the value of `event` with the corresponding code:
 success = api.register_feedback(
   event: 'custom_fraud_name',
   occurred_at: occurred_at,
-  installation_id: installation_id,
+  request_token: request_token,
   account_id: account_id
 )
 
diff --git a/lib/incognia_api/api.rb b/lib/incognia_api/api.rb
index 0aea807..7293c1e 100644
--- a/lib/incognia_api/api.rb
+++ b/lib/incognia_api/api.rb
@@ -15,8 +15,8 @@ def initialize(client_id:, client_secret:)
                                host: "https://api.incognia.com/api")
     end
 
-    def register_signup(installation_id:, address: nil, **opts)
-      params = { installation_id: installation_id }
+    def register_signup(request_token: nil, address: nil, **opts)
+      params = { request_token: request_token }.compact
       params.merge!(opts)
       params.merge!(address&.to_hash) if address
 
@@ -29,12 +29,12 @@ def register_signup(installation_id:, address: nil, **opts)
       SignupAssessment.from_hash(response.body) if response.success?
     end
 
-    def register_login(installation_id:, account_id:, **opts)
+    def register_login(account_id:, request_token: nil, **opts)
       params = {
         type: :login,
-        installation_id: installation_id,
         account_id: account_id,
-      }
+        request_token: request_token
+      }.compact
       params.merge!(opts)
 
       response = connection.request(
@@ -67,8 +67,12 @@ def register_feedback(event:, occurred_at: nil, expires_at: nil, timestamp: nil,
       response.success?
     end
 
-    def register_payment(installation_id:, account_id:, **opts)
-      params = { installation_id: installation_id, account_id: account_id, type: :payment }
+    def register_payment(account_id:, request_token: nil, **opts)
+      params = {
+        type: :payment,
+        account_id: account_id,
+        request_token: request_token
+      }.compact
       params.merge!(opts)
 
       response = connection.request(
diff --git a/lib/incognia_api/version.rb b/lib/incognia_api/version.rb
index 93de543..9db9f87 100644
--- a/lib/incognia_api/version.rb
+++ b/lib/incognia_api/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Incognia
-  VERSION = "1.1.0"
+  VERSION = "1.2.0"
 end
diff --git a/spec/incognia_spec.rb b/spec/incognia_spec.rb
index 9677d8e..3305d58 100644
--- a/spec/incognia_spec.rb
+++ b/spec/incognia_spec.rb
@@ -41,13 +41,13 @@ module Incognia
       let(:structured_address) { Address.new(structured: structured_format ) }
       let(:address) { Address.new(line: line_format) }
       let(:coordinates_address) { Address.new(coordinates: coordinates_format) }
-      let(:installation_id) { SecureRandom.uuid }
+      let(:request_token) { SecureRandom.uuid }
 
       it "when successful returns the resource" do
         stub_token_request
         stub_signup_request
 
-        signup = api.register_signup(installation_id: installation_id, address: address)
+        signup = api.register_signup(request_token: request_token, address: address)
 
         expected = JSON.parse(unknown_signup_fixture, symbolize_names: true)
         expect(signup.id).
@@ -58,66 +58,73 @@ module Incognia
       end
 
       context "HTTP request" do
-        it "hits the endpoint with installation_id" do
-          stub_token_request
+        shared_examples_for 'receiving one of the required tokens' do |token_name|
+          let(:token_value) { SecureRandom.uuid }
 
-          stub = stub_signup_request
-          stub.with(
-            body: { installation_id: installation_id },
-            headers: {
-              'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
-            }
-          )
+          it "hits the endpoint with #{token_name}" do
+            stub_token_request
 
-          api.register_signup(installation_id: installation_id)
+            stub = stub_signup_request
+            stub.with(
+              body: { token_name => token_value },
+              headers: {
+                'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
+              }
+            )
 
-          expect(stub).to have_been_made.once
+            api.register_signup(token_name => token_value)
+
+            expect(stub).to have_been_made.once
+          end
         end
 
-        it "hits the endpoint with installation_id and address_line" do
+        it_behaves_like 'receiving one of the required tokens', :request_token
+        it_behaves_like 'receiving one of the required tokens', :installation_id
+        it_behaves_like 'receiving one of the required tokens', :session_token
+
+        it "hits the endpoint with request_token and address_line" do
           stub_token_request
 
-          stub = stub_signup_request
-          stub.with(
-            body: { installation_id: installation_id, address_line: line_format },
+          stub = stub_signup_request.with(
+            body: { request_token: request_token, address_line: line_format },
             headers: {
               'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
             }
           )
 
-          api.register_signup(installation_id: installation_id, address: address)
+          api.register_signup(request_token: request_token, address: address)
 
           expect(stub).to have_been_made.once
         end
 
-        it "hits the endpoint with installation_id and structured_address" do
+        it "hits the endpoint with request_token and structured_address" do
           stub_token_request
 
           stub = stub_signup_request
           stub.with(
-            body: { installation_id: installation_id, structured_address: structured_format },
+            body: { request_token: request_token, structured_address: structured_format },
             headers: {
               'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
             }
           )
 
-          api.register_signup(installation_id: installation_id, address: structured_address)
+          api.register_signup(request_token: request_token, address: structured_address)
 
           expect(stub).to have_been_made.once
         end
 
-        it "hits the endpoint with installation_id and coordinates" do
+        it "hits the endpoint with request_token and coordinates" do
           stub_token_request
 
           stub = stub_signup_request
           stub.with(
-            body: { installation_id: installation_id, address_coordinates: coordinates_format },
+            body: { request_token: request_token, address_coordinates: coordinates_format },
             headers: {
               'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
             }
           )
 
-          api.register_signup(installation_id: installation_id, address: coordinates_address)
+          api.register_signup(request_token: request_token, address: coordinates_address)
 
           expect(stub).to have_been_made.once
         end
@@ -128,14 +135,14 @@ module Incognia
               stub_token_request
 
               stub = stub_signup_request.with(
-                body: { installation_id: installation_id }.merge(opts),
+                body: { request_token: request_token }.merge(opts),
                 headers: {
                   'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
                 }
               )
 
-              login = api.register_signup(
-                installation_id: installation_id,
+              api.register_signup(
+                request_token: request_token,
                 **opts
               )
 
@@ -154,11 +161,10 @@ module Incognia
           end
         end
       end
-
     end
 
     describe "#register_login" do
-      let(:installation_id) { SecureRandom.uuid }
+      let(:request_token) { SecureRandom.uuid }
       let(:account_id) { SecureRandom.uuid }
 
       it "when successful returns the resource" do
@@ -166,7 +172,7 @@ module Incognia
         stub_login_request
 
         login = api.register_login(
-          installation_id: installation_id,
+          request_token: request_token,
           account_id: account_id
         )
 
@@ -177,27 +183,36 @@ module Incognia
       end
 
       context "HTTP request" do
-        it "hits the endpoint with installation_id and account_id" do
-          stub_token_request
+        shared_examples_for 'receiving one of the required tokens with account_id' do |token_name|
+          let(:token_value) { SecureRandom.uuid }
 
-          stub = stub_login_request.with(
-            body: {
-              type: 'login',
-              installation_id: installation_id, account_id: account_id
-            },
-            headers: {
-              'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
-            }
-          )
+          it "hits the endpoint with #{token_name} and account_id" do
+            stub_token_request
 
-          login = api.register_login(
-            installation_id: installation_id,
-            account_id: account_id
-          )
+            stub = stub_login_request.with(
+              body: {
+                type: 'login',
+                account_id: account_id,
+                token_name => token_value
+              },
+              headers: {
+                'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
+              }
+            )
 
-          expect(stub).to have_been_made.once
+            api.register_login(
+              account_id: account_id,
+              token_name => token_value
+            )
+
+            expect(stub).to have_been_made.once
+          end
         end
 
+        it_behaves_like 'receiving one of the required tokens with account_id', :request_token
+        it_behaves_like 'receiving one of the required tokens with account_id', :installation_id
+        it_behaves_like 'receiving one of the required tokens with account_id', :session_token
+
         context 'when receiving any other optional arguments' do
           shared_examples_for 'receiving optional args' do |optional_arguments|
             it "hits the endpoint also with #{optional_arguments}" do
@@ -206,16 +221,16 @@ module Incognia
               stub = stub_login_request.with(
                 body: {
                   type: 'login',
-                  installation_id: installation_id,
-                  account_id: account_id,
+                  request_token: request_token,
+                  account_id: account_id
                 }.merge(opts),
                 headers: {
                   'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
                 }
               )
 
-              login = api.register_login(
-                installation_id: installation_id,
+              api.register_login(
+                request_token: request_token,
                 account_id: account_id,
                 **opts
               )
@@ -239,7 +254,7 @@ module Incognia
     end
 
     describe "#register_payment" do
-      let(:installation_id) { SecureRandom.uuid }
+      let(:request_token) { SecureRandom.uuid }
       let(:account_id) { SecureRandom.uuid }
 
       it "when successful returns the resource" do
@@ -247,7 +262,7 @@ module Incognia
         stub_payment_request
 
         payment = api.register_payment(
-          installation_id: installation_id,
+          request_token: request_token,
           account_id: account_id
         )
 
@@ -258,27 +273,36 @@ module Incognia
       end
 
       context "HTTP request" do
-        it "hits the endpoint with installation_id and account_id" do
-          stub_token_request
+        shared_examples_for 'receiving one of the required tokens with account_id' do |token_name|
+          let(:token_value) { SecureRandom.uuid }
 
-          stub = stub_payment_request.with(
-            body: {
-              type: 'payment',
-              installation_id: installation_id, account_id: account_id
-            },
-            headers: {
-              'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
-            }
-          )
+          it "hits the endpoint with #{token_name} and account_id" do
+            stub_token_request
 
-          payment = api.register_payment(
-            installation_id: installation_id,
-            account_id: account_id
-          )
+            stub = stub_payment_request.with(
+              body: {
+                type: 'payment',
+                account_id: account_id,
+                token_name => token_value
+              },
+              headers: {
+                'Content-Type' => 'application/json', 'Authorization' => /Bearer.*/
+              }
+            )
 
-          expect(stub).to have_been_made.once
+            api.register_payment(
+              account_id: account_id,
+              token_name => token_value
+            )
+
+            expect(stub).to have_been_made.once
+          end
         end
 
+        it_behaves_like 'receiving one of the required tokens with account_id', :request_token
+        it_behaves_like 'receiving one of the required tokens with account_id', :installation_id
+        it_behaves_like 'receiving one of the required tokens with account_id', :session_token
+
         context 'when receiving any other optional arguments' do
           shared_examples_for 'receiving optional args' do |optional_arguments|
             it "hits the endpoint also with #{optional_arguments}" do
@@ -287,7 +311,7 @@ module Incognia
               stub = stub_payment_request.with(
                 body: {
                   type: 'payment',
-                  installation_id: installation_id,
+                  request_token: request_token,
                   account_id: account_id
                 }.merge(opts),
                 headers: {
@@ -295,8 +319,8 @@ module Incognia
                 }
               )
 
-              payment = api.register_payment(
-                installation_id: installation_id,
+              api.register_payment(
+                request_token: request_token,
                 account_id: account_id,
                 **opts
               )
@@ -305,7 +329,7 @@ module Incognia
             end
           end
 
-          it_behaves_like 'receiving optional args', 'external_id', 'payment request', 'aaa' do
+          it_behaves_like 'receiving optional args', 'external_id' do
             let(:opts) { { external_id: 'external-id' } }
           end
           it_behaves_like 'receiving optional args', 'payment_value' do
@@ -505,7 +529,7 @@ module Incognia
             end
           end
 
-          it_behaves_like 'receiving ids', :installation_id
+          it_behaves_like 'receiving ids', :request_token
           it_behaves_like 'receiving ids', :account_id
           it_behaves_like 'receiving ids', :external_id
           it_behaves_like 'receiving ids', :signup_id