diff --git a/Workspace/client/src/main/java/com/pqt/client/gui/modules/account_screen/AccountScreenModel.java b/Workspace/client/src/main/java/com/pqt/client/gui/modules/account_screen/AccountScreenModel.java
index d682efbc..7bc60966 100644
--- a/Workspace/client/src/main/java/com/pqt/client/gui/modules/account_screen/AccountScreenModel.java
+++ b/Workspace/client/src/main/java/com/pqt/client/gui/modules/account_screen/AccountScreenModel.java
@@ -2,6 +2,7 @@ package com.pqt.client.gui.modules.account_screen;
 
 import com.pqt.client.gui.modules.account_screen.listeners.IAccountScreenModelListener;
 import com.pqt.client.module.account.AccountService;
+import com.pqt.client.module.account.listeners.AccountUpdateBuilder;
 import com.pqt.client.module.account.listeners.IAccountListener;
 import com.pqt.core.entities.user_account.Account;
 import com.pqt.core.entities.user_account.AccountLevel;
@@ -40,15 +41,15 @@ class AccountScreenModel {
     }
 
     void modifyAccount(Account oldVal, Account newVal) {
-        //accountService.submitAccountUpdate(oldVal, newVal);
+        accountService.submitAccountUpdate(new AccountUpdateBuilder().modifyAccount(oldVal,newVal));
     }
 
     void addAccount(Account newVal) {
-        //accountService.submitAccountUpdate(null, newVal);
+        accountService.submitAccountUpdate(new AccountUpdateBuilder().addAccount(newVal));
     }
 
     void removeAccount(Account oldVal) {
-        //accountService.submitAccountUpdate(oldVal, null);
+        accountService.submitAccountUpdate(new AccountUpdateBuilder().removeAccount(oldVal));
     }
 
     Collection<Account> getAccountCollection() {
diff --git a/Workspace/client/src/main/java/com/pqt/client/module/account/AccountService.java b/Workspace/client/src/main/java/com/pqt/client/module/account/AccountService.java
index d9f9884c..341dd1b6 100644
--- a/Workspace/client/src/main/java/com/pqt/client/module/account/AccountService.java
+++ b/Workspace/client/src/main/java/com/pqt/client/module/account/AccountService.java
@@ -1,10 +1,10 @@
 package com.pqt.client.module.account;
 
 import com.pqt.client.module.account.listeners.AccountListenerAdapter;
+import com.pqt.client.module.account.listeners.AccountUpdateBuilder;
 import com.pqt.client.module.query.QueryExecutor;
 import com.pqt.client.module.query.query_callback.ICollectionItemMessageCallback;
 import com.pqt.client.module.query.query_callback.INoItemMessageCallback;
-import com.pqt.core.entities.product.Product;
 import com.pqt.core.entities.user_account.Account;
 import com.pqt.client.module.account.listeners.IAccountListener;
 
@@ -12,7 +12,6 @@ import javax.swing.event.EventListenerList;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.List;
 import java.util.concurrent.CountDownLatch;
 
 //TODO écrire javadoc
@@ -155,4 +154,24 @@ public class AccountService {
             //Nothing to do
         }
     }
+
+    public void submitAccountUpdate(AccountUpdateBuilder builder) {
+        executor.executeAccountUpdateQuery(builder.build(), new INoItemMessageCallback() {
+            @Override
+            public void ack() {
+                //TODO Issue #6 : add log line
+                refreshAccounts();
+            }
+
+            @Override
+            public void err(Throwable cause) {
+                //TODO Issue #6 : add log line
+            }
+
+            @Override
+            public void ref(Throwable cause) {
+                //TODO Issue #6 : add log line
+            }
+        });
+    }
 }
diff --git a/Workspace/client/src/main/java/com/pqt/client/module/account/listeners/AccountUpdateBuilder.java b/Workspace/client/src/main/java/com/pqt/client/module/account/listeners/AccountUpdateBuilder.java
new file mode 100644
index 00000000..37a82b8d
--- /dev/null
+++ b/Workspace/client/src/main/java/com/pqt/client/module/account/listeners/AccountUpdateBuilder.java
@@ -0,0 +1,52 @@
+package com.pqt.client.module.account.listeners;
+
+import com.pqt.core.entities.user_account.Account;
+import com.pqt.core.entities.user_account.AccountUpdate;
+
+import java.util.*;
+
+public class AccountUpdateBuilder {
+
+    private Set<Account> toAdd, toRemove;
+    private Map<Account, Account> toModify;
+
+    public AccountUpdateBuilder() {
+        toAdd = new HashSet<>();
+        toRemove = new HashSet<>();
+        toModify = new HashMap<>();
+    }
+
+    public AccountUpdateBuilder addAccount(Account account) {
+        if(!toAdd.contains(account)){
+            toAdd.add(account);
+        }
+        return this;
+    }
+
+    public AccountUpdateBuilder removeAccount(Account account) {
+        if(!toRemove.contains(account)){
+            toRemove.add(account);
+        }
+        return this;
+    }
+
+    public AccountUpdateBuilder modifyAccount(Account oldVersion, Account newVersion) {
+        toModify.put(oldVersion, newVersion);
+        return this;
+    }
+
+    public List<AccountUpdate> build() {
+        List<AccountUpdate> reply = new ArrayList<>();
+        for(Account account : toAdd){
+            reply.add(new AccountUpdate(null, account));
+        }
+        for(Account account : toRemove){
+            reply.add(new AccountUpdate(account, null));
+        }
+        for(Account account : toModify.keySet()){
+            reply.add(new AccountUpdate(account, toModify.get(account)));
+        }
+
+        return reply;
+    }
+}
diff --git a/Workspace/client/src/main/java/com/pqt/client/module/query/QueryExecutor.java b/Workspace/client/src/main/java/com/pqt/client/module/query/QueryExecutor.java
index e8f7d3f8..0c5c0307 100644
--- a/Workspace/client/src/main/java/com/pqt/client/module/query/QueryExecutor.java
+++ b/Workspace/client/src/main/java/com/pqt/client/module/query/QueryExecutor.java
@@ -13,8 +13,8 @@ import com.pqt.core.entities.messages.MessageType;
 import com.pqt.core.entities.product.Product;
 import com.pqt.core.entities.product.ProductUpdate;
 import com.pqt.core.entities.sale.LightweightSale;
-import com.pqt.core.entities.sale.Sale;
 import com.pqt.core.entities.user_account.Account;
+import com.pqt.core.entities.user_account.AccountUpdate;
 
 import java.util.List;
 
@@ -47,6 +47,10 @@ public class QueryExecutor {
         sendMessage(messageFactory.newStockUpdateMessage(updates), callback, MessageType.ACK_STOCK_UPDATE);
     }
 
+    public void executeAccountUpdateQuery(List<AccountUpdate> updates, INoItemMessageCallback callback) {
+        sendMessage(messageFactory.newAccountUpdateMessage(updates), callback, MessageType.ACK_ACCOUNT_UPDATE);
+    }
+
     public void executeConnectAccountQuery(Account account, boolean desiredState, INoItemMessageCallback callback){
         sendMessage(messageFactory.newConnectAccountMessage(account,desiredState), callback, MessageType.ACK_CONNECT_ACCOUNT);
     }
diff --git a/Workspace/client/src/main/java/com/pqt/client/module/query/QueryMessageFactory.java b/Workspace/client/src/main/java/com/pqt/client/module/query/QueryMessageFactory.java
index 4a7ea260..6f4c7ded 100644
--- a/Workspace/client/src/main/java/com/pqt/client/module/query/QueryMessageFactory.java
+++ b/Workspace/client/src/main/java/com/pqt/client/module/query/QueryMessageFactory.java
@@ -8,6 +8,7 @@ import com.pqt.core.entities.product.ProductUpdate;
 import com.pqt.core.entities.sale.LightweightSale;
 import com.pqt.core.entities.sale.Sale;
 import com.pqt.core.entities.user_account.Account;
+import com.pqt.core.entities.user_account.AccountUpdate;
 
 import java.util.HashMap;
 import java.util.List;
@@ -48,6 +49,12 @@ class QueryMessageFactory {
         return newSimpleMessage(MessageType.QUERY_STOCK_UPDATE, fields);
 	}
 
+    Message newAccountUpdateMessage(List<AccountUpdate> updates) {
+        Map<String, String> fields = new HashMap<>();
+        fields.put("updates", messageToolFactory.getListFormatter(AccountUpdate.class).format(updates));
+        return newSimpleMessage(MessageType.QUERY_ACCOUNT_UPDATE, fields);
+    }
+
 	Message newAccountListMessage(){
         return newSimpleMessage(MessageType.QUERY_ACCOUNT_LIST);
 	}