diff --git a/backend/controllers/followups.ts b/backend/controllers/followups.ts
index 1fc869ce0c..b203fd4e75 100644
--- a/backend/controllers/followups.ts
+++ b/backend/controllers/followups.ts
@@ -10,10 +10,10 @@ import { SurveyType } from "../../lib/enums/survey.js"
 import { FollowupFactory } from "../lib/followup-factory.js"
 import { FetchSurvey } from "../../lib/types/survey.d.js"
 import Request from "../types/express.d.js"
-import { phoneNumberValidation } from "../../lib/phone-number.js"
 import config from "../config/index.js"
 import { sendSimulationResultsEmail } from "../lib/messaging/email/email-service.js"
 import { sendSimulationResultsSms } from "../lib/messaging/sms/sms-service.js"
+import { ErrorType, ErrorStatus, ErrorName } from "../../lib/enums/error.js"
 
 export function followup(
   req: Request,
@@ -39,23 +39,6 @@ export function followup(
     })
 }
 
-async function sendFollowupNotifications(followup: Followup, res: Response) {
-  const { email, phone } = followup
-  if (phone) {
-    if (
-      phoneNumberValidation(phone, config.smsService.internationalDiallingCodes)
-    ) {
-      await sendSimulationResultsSms(followup)
-    } else {
-      return res.status(422).send("Unsupported phone number format")
-    }
-  }
-  if (email) {
-    await sendSimulationResultsEmail(followup)
-  }
-  return res.send({ result: "OK" })
-}
-
 async function createSimulationRecapUrl(req: Request, res: Response) {
   const followup = await FollowupFactory.create(req.simulation)
   await followup.addSurveyIfMissing(
@@ -69,6 +52,7 @@ async function createSimulationRecapUrl(req: Request, res: Response) {
 export async function persist(req: Request, res: Response) {
   const { surveyOptin, email, phone } = req.body
   const simulation = req.simulation
+
   try {
     if (email || phone) {
       const followup = await FollowupFactory.createWithResults(
@@ -77,17 +61,27 @@ export async function persist(req: Request, res: Response) {
         email,
         phone
       )
-      return sendFollowupNotifications(followup, res)
-    } else {
-      return createSimulationRecapUrl(req, res)
+      if (email) await sendSimulationResultsEmail(followup)
+      if (phone) await sendSimulationResultsSms(followup)
+      return res.send({ result: "OK" })
     }
+
+    return createSimulationRecapUrl(req, res)
   } catch (error: any) {
     Sentry.captureException(error)
-    if (error.name === "ValidationError") {
-      return res.status(403).send(error.message)
-    } else {
-      return res.status(500).send(`Error while persisting followup`)
+
+    let status: number = ErrorStatus.InternalServerError
+
+    if (
+      error.name === ErrorName.ValidationError ||
+      error.message === ErrorType.UnsupportedPhoneNumberFormat
+    ) {
+      status = ErrorStatus.UnprocessableEntity
     }
+
+    return res
+      .status(status)
+      .send(error.message || ErrorType.PersistingFollowup)
   }
 }
 
@@ -117,7 +111,7 @@ export function showFollowup(req: Request, res: Response) {
     })
     .catch((error: Error) => {
       console.error("error", error)
-      return res.sendStatus(400)
+      return res.sendStatus(ErrorStatus.BadRequest)
     })
 }
 
@@ -142,12 +136,13 @@ export function showSurveyResults(req: Request, res: Response) {
 export function showSurveyResultByEmail(req: Request, res: Response) {
   Followups.findByEmail(req.params.email)
     .then((followups: Followup[]) => {
-      if (!followups || !followups.length) return res.sendStatus(404)
+      if (!followups || !followups.length)
+        return res.sendStatus(ErrorStatus.NotFound)
       res.send(followups)
     })
     .catch((error: Error) => {
       console.error("error", error)
-      return res.sendStatus(400)
+      return res.sendStatus(ErrorStatus.BadRequest)
     })
 }
 
@@ -160,7 +155,7 @@ export async function followupByAccessToken(
   const followup: Followup | null = await Followups.findOne({
     accessToken,
   })
-  if (!followup) return res.sendStatus(404)
+  if (!followup) return res.sendStatus(ErrorStatus.NotFound)
   req.followup = followup
   next()
 }
@@ -216,7 +211,7 @@ async function getRedirectUrl(req: Request) {
     case SurveyType.TousABordNotification:
       return "https://www.tadao.fr/713-Demandeur-d-emploi.html"
     default:
-      throw new Error(`Unknown survey type: ${surveyType}`)
+      throw new Error(`${ErrorType.UnknownSurveyType} : ${surveyType}`)
   }
 }
 
@@ -227,7 +222,6 @@ export async function logSurveyLinkClick(req: Request, res: Response) {
     res.redirect(redirectUrl)
   } catch (error) {
     Sentry.captureException(error)
-    console.error("error", error)
-    return res.sendStatus(404)
+    return res.sendStatus(ErrorStatus.NotFound)
   }
 }
diff --git a/backend/lib/messaging/email/email-service.ts b/backend/lib/messaging/email/email-service.ts
index cc8232c25c..d28767bd5f 100644
--- a/backend/lib/messaging/email/email-service.ts
+++ b/backend/lib/messaging/email/email-service.ts
@@ -7,13 +7,14 @@ import { EmailType } from "../../../../lib/enums/messaging.js"
 import { SurveyType } from "../../../../lib/enums/survey.js"
 import { Survey } from "../../../../lib/types/survey.js"
 import { Followup } from "../../../../lib/types/followup.js"
+import { ErrorType } from "../../../../lib/enums/error.js"
 import dayjs from "dayjs"
 
 export async function sendSimulationResultsEmail(
   followup: Followup
 ): Promise<Followup> {
   if (!followup.email) {
-    throw new Error("Missing followup email")
+    throw new Error(ErrorType.MissingFollowupEmail)
   }
   const render: any = await emailRender(EmailType.SimulationResults, followup)
   const sendEmailSmtpResponse = await sendEmailSmtp({
diff --git a/backend/lib/messaging/sms/sms-service.ts b/backend/lib/messaging/sms/sms-service.ts
index b9e10becf1..20f447755f 100644
--- a/backend/lib/messaging/sms/sms-service.ts
+++ b/backend/lib/messaging/sms/sms-service.ts
@@ -1,10 +1,14 @@
 import axios from "axios"
 import config from "../../../config/index.js"
-import { phoneNumberFormatting } from "./../../../../lib/phone-number.js"
+import {
+  phoneNumberFormatting,
+  phoneNumberValidation,
+} from "./../../../../lib/phone-number.js"
 import { SmsType } from "../../../../lib/enums/messaging.js"
 import { Followup } from "../../../../lib/types/followup.js"
 import { Survey } from "../../../../lib/types/survey.d.js"
 import { SurveyType } from "../../../../lib/enums/survey.js"
+import { ErrorType } from "../../../../lib/enums/error.js"
 import dayjs from "dayjs"
 import Sentry from "@sentry/node"
 
@@ -69,7 +73,16 @@ export async function sendSimulationResultsSms(
 ): Promise<Followup> {
   try {
     if (!followup.phone) {
-      throw new Error("Missing followup phone")
+      throw new Error(ErrorType.MissingFollowupPhone)
+    }
+
+    if (
+      !phoneNumberValidation(
+        followup.phone,
+        config.smsService.internationalDiallingCodes
+      )
+    ) {
+      throw new Error(ErrorType.UnsupportedPhoneNumberFormat)
     }
 
     const { username, password } = await getSMSConfig()
@@ -90,10 +103,14 @@ export async function sendSimulationResultsSms(
     followup.smsSentAt = dayjs().toDate()
     followup.smsMessageId = data.messageIds[0]
     return await followup.save()
-  } catch (err) {
-    Sentry.captureException(err)
-    followup.smsError = JSON.stringify(err, null, 2)
-    throw err
+  } catch (error: any) {
+    // Avoid sending invalid destination address error to sentry
+    if (!error?.message?.includes("Invalid destination address")) {
+      Sentry.captureException(error)
+    }
+    followup.smsError = error?.message
+    await followup.save()
+    throw error
   }
 }
 
diff --git a/lib/enums/error.ts b/lib/enums/error.ts
new file mode 100644
index 0000000000..89ab511b6c
--- /dev/null
+++ b/lib/enums/error.ts
@@ -0,0 +1,20 @@
+export enum ErrorType {
+  UnsupportedPhoneNumberFormat = "Unsupported phone number format",
+  PersistingFollowup = "Persisting followup error",
+  MissingFollowupPhone = "Missing followup phone",
+  MissingFollowupEmail = "Missing followup email",
+  UnknownSurveyType = "Unknown survey type",
+}
+
+export enum ErrorStatus {
+  BadRequest = 400,
+  Unauthorized = 401,
+  Forbidden = 403,
+  UnprocessableEntity = 422,
+  NotFound = 404,
+  InternalServerError = 500,
+}
+
+export enum ErrorName {
+  ValidationError = "ValidationError",
+}
diff --git a/src/components/modals/errors-email-and-sms-modal.vue b/src/components/modals/errors-email-and-sms-modal.vue
index d46b10e460..c5217afefb 100644
--- a/src/components/modals/errors-email-and-sms-modal.vue
+++ b/src/components/modals/errors-email-and-sms-modal.vue
@@ -25,6 +25,16 @@ const recapEmailState = computed(() => store.recapEmailState)
           }}
         </p>
       </div>
+      <div
+        v-if="recapPhoneState === 'invalid-address'"
+        class="fr-alert fr-alert--error"
+      >
+        <p>
+          Une erreur s'est produite dans l'envoi du récapitulatif par SMS :
+          l'adresse de destination est invalide. Veuillez réessayer avec un
+          numéro valide ou utiliser l'envoi par email seulement.
+        </p>
+      </div>
       <div
         v-if="recapPhoneState === 'ok' && recapEmailState === 'ok'"
         class="fr-alert fr-alert--success"
diff --git a/src/components/recap-email-and-sms-form.vue b/src/components/recap-email-and-sms-form.vue
index c9905da0fd..79a349492a 100644
--- a/src/components/recap-email-and-sms-form.vue
+++ b/src/components/recap-email-and-sms-form.vue
@@ -81,9 +81,12 @@ const sendRecap = async (surveyOptin) => {
         ABTestingService.getValues().CTA_EmailRecontact
       )
     }
-  } catch (error) {
-    console.error(error)
-    Sentry.captureException(error)
+  } catch (error: any) {
+    if (!error?.response?.data?.includes("Invalid destination address")) {
+      Sentry.captureException(error)
+    } else {
+      store.setFormRecapPhoneState("invalid-address")
+    }
   }
 }
 
@@ -181,7 +184,6 @@ const sendRecapByEmail = async (surveyOptin) => {
     store.setModalState(undefined)
     await postFollowup(surveyOptin, emailValue.value)
   } catch (error) {
-    Sentry.captureException(error)
     store.setFormRecapEmailState("error")
     throw error
   }