diff --git a/src/app/screens/LoginScreen.js b/src/app/screens/LoginScreen.js
index 667b470..ef51d79 100644
--- a/src/app/screens/LoginScreen.js
+++ b/src/app/screens/LoginScreen.js
@@ -18,6 +18,7 @@ import Button from "../components/Button";
 import { TouchableNativeFeedback } from "react-native-gesture-handler";
 import { login, userPersonalData } from "../api/auth";
 import PasswordFormField from "../components/forms/PasswordFormField";
+import ConfirmationModal from "../components/ConfirmationModal";
 
 const phoneRegex = RegExp(
   /^\(?[\(]?([0-9]{2})?\)?[)\b]?([0-9]{4,5})[-. ]?([0-9]{4})$/
@@ -75,22 +76,40 @@ function DashedOrSeparator() {
 
 export default function LoginScreen(props) {
   const authContext = useContext(AuthContext);
+  const [showLog, setShowLog] = useState({ show: false, message: "" });
 
   const handleSubmit = async (name, password, setLoginFailed) => {
     const result = await login(name, password);
 
-    if (!result.ok) return setLoginFailed(true);
+    switch (result.status) {
+      case 404:
+        setLoginFailed(true);
+        return;
+      case 400:
+        setShowLog({
+          show: true,
+          message: "Um erro inesperado ocorreu. Tente novamente mais tarde",
+        });
+        return;
+    }
+
     await authStorage.setToken(result.data);
-    // console.log("TOKEN:  " + result.data);
 
-    setLoginFailed(false);
+    result.ok && setLoginFailed(false);
     const user = await userPersonalData();
     user.ok && authContext.setUser(user.data);
   };
 
   const [loginFailed, setLoginFailed] = useState(false);
+
   return (
     <Screen style={[styles.containter, { backgroundColor: colors.grayBG }]}>
+      <ConfirmationModal
+        show={showLog.show}
+        description={showLog.message}
+        confirmationLabel="OK"
+        onConfirm={() => setShowLog({ ...showLog, show: false })}
+      />
       <Form
         initialValues={{
           name: "",
@@ -110,10 +129,12 @@ export default function LoginScreen(props) {
             marginBottom={dimensions.spacing.big_padding}
           />
 
-          <ErrorMessage
-            error="Email ou senha inválidos"
-            visible={loginFailed}
-          />
+          <View style={{ paddingHorizontal: 16, marginBottom: 12 }}>
+            <ErrorMessage
+              error="Email ou senha inválidos"
+              visible={loginFailed}
+            />
+          </View>
 
           <View style={{ paddingBottom: 24 }}>
             <FormField
diff --git a/src/app/screens/RainSharingDataScreen.js b/src/app/screens/RainSharingDataScreen.js
index 9e23654..bc23668 100644
--- a/src/app/screens/RainSharingDataScreen.js
+++ b/src/app/screens/RainSharingDataScreen.js
@@ -209,7 +209,9 @@ const styles = StyleSheet.create({
     backgroundColor: colors.white,
   },
   error_txt: {
-    fontSize: dimensions.text.default,
+    paddingHorizontal: 16,
+    marginTop: 12,
+    fontSize: 18,
     color: colors.danger,
   },
   labelStyle: {
diff --git a/src/app/screens/RegisterScreen.js b/src/app/screens/RegisterScreen.js
index a749809..a5d0a0d 100644
--- a/src/app/screens/RegisterScreen.js
+++ b/src/app/screens/RegisterScreen.js
@@ -265,7 +265,7 @@ export default function RegisterScreen(props) {
   const [date, setDate] = useState(_moment);
   const [singUpFailed, setSingUpFailed] = useState(false);
   const [scroll, setScroll] = useState();
-  const [showLog, setShowLog] = useState(false);
+  const [showLog, setShowLog] = useState({show: false, message: ""});
 
   const comparePassword = (password, confirmPassword) => {
     if (password !== confirmPassword) {
@@ -286,25 +286,25 @@ export default function RegisterScreen(props) {
   };
 
   const handleSubmit = async (form) => {
-    console.log("apaaaaaaa");
     const formDate =
       date.format("DD/MM/yyyy") === moment().format("DD/MM/yyyy") ? "" : date;
 
     const result = await signup({ ...form, dateofborn: formDate });
-    // console.log(result)
 
     switch (result.status) {
       case 200:
         automaticLogin(form);
         break;
-      case 422:
-      // setError()
+      default:
+        setShowLog({show: true, message: "Um erro inesperado ocorreu. Tente novamente mais tarde"})
+
     }
   };
 
   const fieldsAreNotInUse = async (form, actions) => {
-    var inUse = true;
+    var inUse = false;
     const ru = await existUsername(form.number);
+    
     if (ru.data) {
       actions.setFieldError("number", "Este número de telefone já está em uso");
       inUse = false;
@@ -315,17 +315,22 @@ export default function RegisterScreen(props) {
       actions.setFieldError("name", "Este apelido de usuário já está em uso");
       inUse = false;
     }
+    
+    if (!ru.ok || !rn.ok)
+      setShowLog({show: true, message: "Um erro inesperado ocorreu. Tente novamente mais tarde"})
+
+    inUse && setShowLog({show: true, message: "Apelido de usuário ou telefone em uso"})
 
-    return inUse;
+    return !inUse;
   };
 
   return (
     <Screen style={styles.containter}>
       <ConfirmationModal
-        show={showLog}
-        description="Apelido de usuário ou telefone em uso"
+        show={showLog.show}
+        description={showLog.message}
         confirmationLabel="OK"
-        onConfirm={() => setShowLog(false)}
+        onConfirm={() => setShowLog({...showLog, show:false})}
       />
       <Form
         initialValues={{
@@ -347,7 +352,7 @@ export default function RegisterScreen(props) {
           comparePassword(form.password, form.confirmPassword);
 
           fieldsAreNotInUse(form, actions).then((isNotUsed) => {
-            isNotUsed ? handleSubmit(form) : setShowLog(true);
+            isNotUsed && handleSubmit(form);
             // NOTE: this woud be nice, but does not work...
             // : scroll.scrollTo({
             //     x: 0,
diff --git a/src/app/screens/RiverFloodSharingDataScreen.js b/src/app/screens/RiverFloodSharingDataScreen.js
index 422e66b..34a1548 100644
--- a/src/app/screens/RiverFloodSharingDataScreen.js
+++ b/src/app/screens/RiverFloodSharingDataScreen.js
@@ -219,6 +219,8 @@ const styles = StyleSheet.create({
     justifyContent: "space-between",
   },
   error_txt: {
+    paddingHorizontal: 16,
+    marginTop: 12,
     fontSize: 18,
     color: colors.danger,
   },
diff --git a/src/app/screens/SharingFloodZonesScreen.js b/src/app/screens/SharingFloodZonesScreen.js
index 419f7fe..03d035a 100644
--- a/src/app/screens/SharingFloodZonesScreen.js
+++ b/src/app/screens/SharingFloodZonesScreen.js
@@ -181,6 +181,7 @@ const styles = StyleSheet.create({
     justifyContent: "center",
   },
   error_txt: {
+    marginTop: 12,
     paddingHorizontal: 16,
     fontSize: 18,
     color: colors.danger,