diff --git a/packages/code-du-travail-frontend/src/e2e/contributions.e2e.ts b/packages/code-du-travail-frontend/src/e2e/contributions.e2e.ts
index e65f0c5ce3..3619bcfc39 100644
--- a/packages/code-du-travail-frontend/src/e2e/contributions.e2e.ts
+++ b/packages/code-du-travail-frontend/src/e2e/contributions.e2e.ts
@@ -69,9 +69,10 @@ test.describe("Contributions", () => {
     );
 
     await page
-      .getByRole("button", {
-        name: "Afficher les informations sans sélectionner une convention collective",
-      })
+      .getByLabel("Je ne souhaite pas renseigner ma convention collective.")
+      .check({ force: true });
+    await page
+      .getByRole("button", { name: "Afficher les informations" })
       .click();
     await expect(
       page.getByText(
diff --git a/packages/code-du-travail-frontend/src/modules/contributions/ContributionGeneric.tsx b/packages/code-du-travail-frontend/src/modules/contributions/ContributionGeneric.tsx
index 3e21bef1f5..f3d35abcbf 100644
--- a/packages/code-du-travail-frontend/src/modules/contributions/ContributionGeneric.tsx
+++ b/packages/code-du-travail-frontend/src/modules/contributions/ContributionGeneric.tsx
@@ -10,8 +10,6 @@ import {
 } from "../utils/useLocalStorage";
 import { useRouter } from "next/navigation";
 import { ContributionGenericAgreementSearch } from "./ContributionGenericAgreementSearch";
-import { Button } from "@codegouvfr/react-dsfr/Button";
-import { fr } from "@codegouvfr/react-dsfr";
 
 type Props = {
   contribution: Contribution;
@@ -33,8 +31,6 @@ export function ContributionGeneric({ contribution }: Props) {
     emitAgreementUntreatedEvent,
     emitDisplayAgreementContent,
     emitDisplayGeneralContent,
-    emitDisplayGenericContent,
-    emitClickP3,
   } = useContributionTracking();
   const genericTitleRef = useRef<HTMLDivElement>(null);
 
@@ -94,8 +90,6 @@ export function ContributionGeneric({ contribution }: Props) {
             scrollToTitle();
             if (selectedAgreement) {
               emitDisplayGeneralContent(getTitle());
-            } else {
-              emitDisplayGenericContent(getTitle());
             }
           } else {
             emitDisplayAgreementContent(getTitle());
@@ -106,40 +100,24 @@ export function ContributionGeneric({ contribution }: Props) {
       />
 
       {!isNoCDT && !isAgreementValid(contribution, selectedAgreement) && (
-        <>
-          {!displayGeneric && (
-            <Button
-              className={fr.cx("fr-mb-6w")}
-              priority="tertiary no outline"
-              onClick={() => {
-                setDisplayGeneric(true);
-                scrollToTitle();
-                emitClickP3(getTitle());
-              }}
-            >
-              Afficher les informations sans sélectionner une convention
-              collective
-            </Button>
-          )}
-          <ContributionGenericContent
-            ref={genericTitleRef}
-            contribution={contribution}
-            relatedItems={relatedItems}
-            displayGeneric={displayGeneric}
-            alertText={
-              selectedAgreement &&
-              !isAgreementSupported(contribution, selectedAgreement) && (
-                <p>
-                  <strong>
-                    Cette réponse correspond à ce que prévoit le code du
-                    travail, elle ne tient pas compte des spécificités de la{" "}
-                    {selectedAgreement.shortTitle}
-                  </strong>
-                </p>
-              )
-            }
-          />
-        </>
+        <ContributionGenericContent
+          ref={genericTitleRef}
+          contribution={contribution}
+          relatedItems={relatedItems}
+          displayGeneric={displayGeneric}
+          alertText={
+            selectedAgreement &&
+            !isAgreementSupported(contribution, selectedAgreement) && (
+              <p>
+                <strong>
+                  Cette réponse correspond à ce que prévoit le code du travail,
+                  elle ne tient pas compte des spécificités de la{" "}
+                  {selectedAgreement.shortTitle}
+                </strong>
+              </p>
+            )
+          }
+        />
       )}
     </>
   );
diff --git a/packages/code-du-travail-frontend/src/modules/contributions/ContributionGenericAgreementSearch.tsx b/packages/code-du-travail-frontend/src/modules/contributions/ContributionGenericAgreementSearch.tsx
index 64d8a793a5..d4fa5747d8 100644
--- a/packages/code-du-travail-frontend/src/modules/contributions/ContributionGenericAgreementSearch.tsx
+++ b/packages/code-du-travail-frontend/src/modules/contributions/ContributionGenericAgreementSearch.tsx
@@ -6,7 +6,10 @@ import Image from "next/image";
 import AgreementSearch from "../convention-collective/AgreementSearch.svg";
 import { useRouter } from "next/navigation";
 
-import { Agreement } from "src/modules/outils/indemnite-depart/types";
+import {
+  Agreement,
+  AgreementRoute,
+} from "src/modules/outils/indemnite-depart/types";
 import {
   isAgreementSupported,
   isAgreementUnextended,
@@ -16,6 +19,7 @@ import { Contribution } from "./type";
 import Link from "../common/Link";
 import BlueCard from "../common/BlueCard";
 import { AgreementSearchForm } from "../convention-collective/AgreementSearch/AgreementSearchForm";
+import { AccessibleAlert } from "../outils/common/components/AccessibleAlert";
 
 type Props = {
   onAgreementSelect: (agreement?: Agreement) => void;
@@ -26,6 +30,9 @@ type Props = {
   personalizeTitleRef: React.RefObject<HTMLParagraphElement | null>;
 };
 
+const MISSING_ROUTE_ERROR =
+  "Veuillez sélectionner l'une des options ci-dessus pour afficher les informations.";
+
 export function ContributionGenericAgreementSearch({
   contribution,
   onAgreementSelect,
@@ -35,8 +42,12 @@ export function ContributionGenericAgreementSearch({
   personalizeTitleRef,
 }: Props) {
   const router = useRouter();
-  const { slug } = contribution;
+  const { slug, isNoCDT } = contribution;
   const [isValid, setIsValid] = useState(false);
+  const [selectedRoute, setSelectedRoute] = useState<
+    AgreementRoute | undefined
+  >();
+  const [showMissingRouteError, setShowMissingRouteError] = useState(false);
 
   useEffect(() => {
     setIsValid(isAgreementValid(contribution, selectedAgreement));
@@ -45,7 +56,7 @@ export function ContributionGenericAgreementSearch({
   const selectedAgreementAlert = (agreement: Agreement) => {
     const isSupported = isAgreementSupported(contribution, agreement);
     const isUnextended = isAgreementUnextended(contribution, agreement);
-    if (contribution.isNoCDT) {
+    if (isNoCDT) {
       if (isUnextended && agreement.url)
         return (
           <>
@@ -90,6 +101,27 @@ export function ContributionGenericAgreementSearch({
     if (!isSupported)
       return <>Vous pouvez consulter les informations générales ci-dessous.</>;
   };
+
+  const noAgreementBanner = (
+    <AccessibleAlert
+      title="Information"
+      description={
+        <p>
+          Vous pouvez passer cette étape et poursuivre la simulation qui vous
+          fournira un résultat basé sur le code du travail. Nous vous
+          recommandons de renseigner votre convention collective qui peut
+          prévoir un résultat plus favorable que celui définit par le code du
+          travail.
+        </p>
+      }
+      severity="info"
+      className={["fr-mt-2w"]}
+      data-testid="no-agreement-banner"
+    />
+  );
+
+  const isButtonDisplayed = (isNoCDT && isValid) || !isNoCDT;
+
   return (
     <BlueCard>
       <div className={fr.cx("fr-grid-row")}>
@@ -123,12 +155,30 @@ export function ContributionGenericAgreementSearch({
             );
             personalizeTitle?.focus();
           }}
+          showNoAgreementOption={!isNoCDT}
+          noAgreementContent={noAgreementBanner}
+          onRouteChange={(route) => {
+            setSelectedRoute(route);
+            setShowMissingRouteError(false);
+          }}
+          error={showMissingRouteError ? MISSING_ROUTE_ERROR : undefined}
         />
-        {((contribution.isNoCDT && isValid) || !contribution.isNoCDT) && (
+        {isButtonDisplayed && (
           <Button
             className={fr.cx("fr-mt-2w")}
             type="button"
             onClick={(event) => {
+              if (!selectedRoute) {
+                event.preventDefault();
+                setShowMissingRouteError(true);
+                return;
+              }
+              setShowMissingRouteError(false);
+              if (selectedRoute === "no-agreement") {
+                event.preventDefault();
+                onDisplayClick(false);
+                return;
+              }
               onDisplayClick(isValid && !!selectedAgreement);
               if (isValid && selectedAgreement) {
                 router.push(
diff --git a/packages/code-du-travail-frontend/src/modules/contributions/__tests__/contribution-generic.tracking.test.tsx b/packages/code-du-travail-frontend/src/modules/contributions/__tests__/contribution-generic.tracking.test.tsx
index 02c615e022..4e0eb74cba 100644
--- a/packages/code-du-travail-frontend/src/modules/contributions/__tests__/contribution-generic.tracking.test.tsx
+++ b/packages/code-du-travail-frontend/src/modules/contributions/__tests__/contribution-generic.tracking.test.tsx
@@ -235,32 +235,31 @@ describe("<ContributionGeneric />", () => {
     ]);
   });
 
-  it("afficher les infos - sans CC", async () => {
+  it("afficher les infos - sans radio sélectionné : le clic sur le bouton principal est bloqué et n'envoie aucun évènement", async () => {
     expect(sendEvent).toHaveBeenCalledTimes(0);
 
     render(<ContributionGeneric contribution={contribution} />);
     expect(ui.generic.buttonDisplayInfo.get()).toBeInTheDocument();
     fireEvent.click(ui.generic.buttonDisplayInfo.get());
-    expect(sendEvent).toHaveBeenCalledTimes(1);
-    expect(sendEvent).toHaveBeenLastCalledWith({
-      action: "click_afficher_les_informations_sans_CC",
-      category: "contribution",
-      name: "/contribution/my-contrib",
-    });
+    expect(ui.generic.missingRouteError.query()).toBeInTheDocument();
+    expect(sendEvent).toHaveBeenCalledTimes(0);
   });
 
-  it("voir les infos générales", () => {
+  it("voir les infos générales via l'option « Je ne souhaite pas renseigner ma convention collective »", () => {
     expect(sendEvent).toHaveBeenCalledTimes(0);
 
     render(<ContributionGeneric contribution={contribution} />);
 
-    fireEvent.click(ui.generic.linkDisplayInfo.get());
-
+    fireEvent.click(ui.generic.radioNoAgreement.get());
     expect(sendEvent).toHaveBeenCalledTimes(1);
-    expect(sendEvent).toHaveBeenCalledWith({
+    expect(sendEvent).toHaveBeenLastCalledWith({
       action: "click_p3",
       category: "cc_search_type_of_users",
       name: "/contribution/my-contrib",
     });
+
+    fireEvent.click(ui.generic.buttonDisplayInfo.get());
+    // No additional event is emitted: click_p3 already captures the intent
+    expect(sendEvent).toHaveBeenCalledTimes(1);
   });
 });
diff --git a/packages/code-du-travail-frontend/src/modules/contributions/__tests__/contributions.test.tsx b/packages/code-du-travail-frontend/src/modules/contributions/__tests__/contributions.test.tsx
index 8aed3cfd10..72de77e6fe 100644
--- a/packages/code-du-travail-frontend/src/modules/contributions/__tests__/contributions.test.tsx
+++ b/packages/code-du-travail-frontend/src/modules/contributions/__tests__/contributions.test.tsx
@@ -114,14 +114,34 @@ describe("<ContributionLayout />", () => {
       });
     });
 
-    it("should display correctly when no agreement is selected", async () => {
-      fireEvent.click(ccUi.radio.agreementSearchOption.get());
+    it("should display the no-agreement banner and the generic content when the no-agreement option is selected", async () => {
+      fireEvent.click(ui.generic.radioNoAgreement.get());
+      expect(ui.generic.noAgreementBanner.query()).toBeInTheDocument();
       expect(ccUi.buttonDisplayInfo.query()).toBeInTheDocument();
-      expect(ui.generic.linkDisplayInfo.query()).toBeInTheDocument();
       expect(rendering.getByText("my content")).toBeInTheDocument();
-      fireEvent.click(ui.generic.linkDisplayInfo.get());
-      expect(ui.generic.linkDisplayInfo.query()).not.toBeInTheDocument();
+
+      fireEvent.click(ccUi.buttonDisplayInfo.get());
+
       expect(rendering.getByText("my content")).toBeInTheDocument();
+      expect(pushMock).not.toHaveBeenCalled();
+    });
+
+    it("should display an error when clicking 'Afficher les informations' without selecting any radio option", async () => {
+      expect(ui.generic.missingRouteError.query()).not.toBeInTheDocument();
+
+      fireEvent.click(ccUi.buttonDisplayInfo.get());
+
+      expect(ui.generic.missingRouteError.query()).toBeInTheDocument();
+      expect(pushMock).not.toHaveBeenCalled();
+    });
+
+    it("should hide the error when a radio option is selected after the error is shown", async () => {
+      fireEvent.click(ccUi.buttonDisplayInfo.get());
+      expect(ui.generic.missingRouteError.query()).toBeInTheDocument();
+
+      fireEvent.click(ui.generic.radioNoAgreement.get());
+
+      expect(ui.generic.missingRouteError.query()).not.toBeInTheDocument();
     });
 
     it("should display correctly when a treated agreement is selected", async () => {
@@ -140,14 +160,11 @@ describe("<ContributionLayout />", () => {
         ])
       );
       fireEvent.click(ccUi.radio.agreementSearchOption.get());
-      expect(ui.generic.linkDisplayInfo.query()).toBeInTheDocument();
       await userEvent.click(ccUi.searchByName.input.get());
       await userEvent.type(ccUi.searchByName.input.get(), "16");
 
       fireEvent.click(ccUi.searchByName.autocompleteLines.IDCC16.name.get());
 
-      expect(ui.generic.linkDisplayInfo.query()).not.toBeInTheDocument();
-
       fireEvent.click(ccUi.buttonDisplayInfo.get());
       expect(pushMock).toHaveBeenCalledTimes(1);
       expect(pushMock).toHaveBeenCalledWith("/contribution/16-slug");
@@ -183,7 +200,6 @@ describe("<ContributionLayout />", () => {
 
       await ccUi.searchByName.autocompleteLines.IDCC1388.name.find();
       fireEvent.click(ccUi.searchByName.autocompleteLines.IDCC1388.name.get());
-      expect(ui.generic.linkDisplayInfo.query()).toBeInTheDocument();
 
       expect(ccUi.warning.title.query()).toBeInTheDocument();
       expect(ccUi.warning.nonTreatedAgreement.query()).toBeInTheDocument();
@@ -192,10 +208,9 @@ describe("<ContributionLayout />", () => {
         category: "outil",
         name: "1388",
       });
-      expect(ccUi.warning.title.query()).toBeInTheDocument();
-      fireEvent.click(ui.generic.linkDisplayInfo.get());
+      fireEvent.click(ccUi.buttonDisplayInfo.get());
+      expect(pushMock).not.toHaveBeenCalled();
       expect(ui.generic.nonTreatedInfo.query()).toBeInTheDocument();
-      expect(ui.generic.linkDisplayInfo.query()).not.toBeInTheDocument();
     });
   });
 
@@ -208,10 +223,13 @@ describe("<ContributionLayout />", () => {
     });
     it("should display correctly when no agreement is selected", () => {
       fireEvent.click(ccUi.radio.agreementSearchOption.get());
-      expect(ui.generic.linkDisplayInfo.query()).not.toBeInTheDocument();
       expect(ccUi.buttonDisplayInfo.query()).not.toBeInTheDocument();
     });
 
+    it("should not display the no-agreement option in noCDT mode", () => {
+      expect(ui.generic.radioNoAgreement.query()).not.toBeInTheDocument();
+    });
+
     it("should display correctly when a treated agreement is selected", async () => {
       (searchAgreement as jest.Mock).mockImplementation(() =>
         Promise.resolve([
@@ -266,7 +284,6 @@ describe("<ContributionLayout />", () => {
       await userEvent.click(ccUi.searchByName.input.get());
       await userEvent.type(ccUi.searchByName.input.get(), "1388");
       fireEvent.click(ccUi.searchByName.autocompleteLines.IDCC1388.name.get());
-      expect(ui.generic.linkDisplayInfo.query()).not.toBeInTheDocument();
       expect(ccUi.buttonDisplayInfo.query()).not.toBeInTheDocument();
       expect(ccUi.warning.title.query()).toBeInTheDocument();
       expect(ccUi.warning.noCdtNonTreatedAgreement.query()).toBeInTheDocument();
@@ -302,7 +319,6 @@ describe("<ContributionLayout />", () => {
       await userEvent.click(ccUi.searchByName.input.get());
       await userEvent.type(ccUi.searchByName.input.get(), "29");
       fireEvent.click(ccUi.searchByName.autocompleteLines.IDCC29.name.get());
-      expect(ui.generic.linkDisplayInfo.query()).not.toBeInTheDocument();
       expect(ccUi.buttonDisplayInfo.query()).not.toBeInTheDocument();
       expect(ccUi.warning.title.query()).toBeInTheDocument();
       expect(ccUi.warning.noCdtUnextendedAgreement.query()).toBeInTheDocument();
diff --git a/packages/code-du-travail-frontend/src/modules/contributions/__tests__/ui.ts b/packages/code-du-travail-frontend/src/modules/contributions/__tests__/ui.ts
index a212add0fa..45d8a385b1 100644
--- a/packages/code-du-travail-frontend/src/modules/contributions/__tests__/ui.ts
+++ b/packages/code-du-travail-frontend/src/modules/contributions/__tests__/ui.ts
@@ -1,15 +1,19 @@
-import { byText } from "testing-library-selector";
+import { byLabelText, byTestId, byText } from "testing-library-selector";
 import { searchAgreement } from "../../convention-collective";
 
 export const ui = {
   generic: {
     buttonDisplayInfo: byText(/Afficher les informations$/),
-    linkDisplayInfo: byText(
-      "Afficher les informations sans sélectionner une convention collective"
-    ),
     nonTreatedInfo: byText(
       /Cette réponse correspond à ce que prévoit le code du travail/
     ),
+    missingRouteError: byText(
+      /Veuillez sélectionner l'une des options ci-dessus/
+    ),
+    noAgreementBanner: byTestId("no-agreement-banner"),
+    radioNoAgreement: byLabelText(
+      /Je ne souhaite pas renseigner ma convention collective\./
+    ),
   },
 };
 export const mockAgreementSearch = (idcc) =>
diff --git a/packages/code-du-travail-frontend/src/modules/contributions/tracking.ts b/packages/code-du-travail-frontend/src/modules/contributions/tracking.ts
index 5ae6ae9e3a..e24eb05abf 100644
--- a/packages/code-du-travail-frontend/src/modules/contributions/tracking.ts
+++ b/packages/code-du-travail-frontend/src/modules/contributions/tracking.ts
@@ -9,7 +9,6 @@ export enum TrackingContributionCategory {
 
 export enum TrackingAgreementSearchAction {
   CLICK_DISPLAY_AGREEMENT_CONTENT = "click_afficher_les_informations_CC",
-  CLICK_DISPLAY_GENERIC_CONTENT = "click_afficher_les_informations_sans_CC",
   CLICK_DISPLAY_GENERAL_CONTENT = "click_afficher_les_informations_générales",
   CLICK_P1 = "click_p1",
   CLICK_P2 = "click_p2",
@@ -41,14 +40,6 @@ export const useContributionTracking = () => {
     });
   };
 
-  const emitDisplayGenericContent = (path: string) => {
-    sendEvent({
-      category: TrackingContributionCategory.CONTRIBUTION,
-      action: TrackingAgreementSearchAction.CLICK_DISPLAY_GENERIC_CONTENT,
-      name: path,
-    });
-  };
-
   const emitDisplayGeneralContent = (path: string) => {
     sendEvent({
       category: TrackingContributionCategory.CONTRIBUTION,
@@ -86,7 +77,6 @@ export const useContributionTracking = () => {
     emitAgreementUntreatedEvent,
     emitDisplayAgreementContent,
     emitDisplayGeneralContent,
-    emitDisplayGenericContent,
     emitClickP1,
     emitClickP2,
     emitClickP3,
diff --git a/packages/code-du-travail-frontend/src/modules/convention-collective/AgreementSearch/AgreementSearchForm.tsx b/packages/code-du-travail-frontend/src/modules/convention-collective/AgreementSearch/AgreementSearchForm.tsx
index 7bfd44398a..1a8953f68d 100644
--- a/packages/code-du-travail-frontend/src/modules/convention-collective/AgreementSearch/AgreementSearchForm.tsx
+++ b/packages/code-du-travail-frontend/src/modules/convention-collective/AgreementSearch/AgreementSearchForm.tsx
@@ -20,6 +20,10 @@ type Props = {
   trackingActionName: string;
   level: 2 | 3;
   onBackToPersonalize?: () => void;
+  showNoAgreementOption?: boolean;
+  noAgreementContent?: ReactNode;
+  onRouteChange?: (route: AgreementRoute | undefined) => void;
+  error?: string;
 };
 
 export const AgreementSearchForm = ({
@@ -29,6 +33,10 @@ export const AgreementSearchForm = ({
   trackingActionName,
   level,
   onBackToPersonalize,
+  showNoAgreementOption = false,
+  noAgreementContent,
+  onRouteChange,
+  error,
 }: Props) => {
   const [selectedRoute, setSelectedRoute] = useState<
     AgreementRoute | undefined
@@ -37,24 +45,32 @@ export const AgreementSearchForm = ({
   useEffect(() => {
     if (defaultAgreement && !selectedRoute) {
       setSelectedRoute("agreement");
+      onRouteChange?.("agreement");
     }
   }, [defaultAgreement]);
 
-  const { emitClickP1, emitClickP2 } = useContributionTracking();
+  const { emitClickP1, emitClickP2, emitClickP3 } = useContributionTracking();
 
   const { emitSelectEvent } = useAgreementSearchTracking();
 
+  const updateRoute = (route: AgreementRoute) => {
+    setSelectedRoute(route);
+    onRouteChange?.(route);
+  };
+
   return (
     <>
       <RadioButtons
-        legend="Quel est le nom de la convention collective applicable ?"
+        legend="Quel est le nom de la convention collective applicable ?"
+        state={error ? "error" : "default"}
+        stateRelatedMessage={error}
         options={[
           {
             label:
               "Je sais quelle est ma convention collective et je la saisis.",
             nativeInputProps: {
               checked: selectedRoute === "agreement",
-              onChange: () => setSelectedRoute("agreement"),
+              onChange: () => updateRoute("agreement"),
             },
           },
           {
@@ -64,10 +80,26 @@ export const AgreementSearchForm = ({
               checked: selectedRoute === "enterprise",
               onChange: () => {
                 onAgreementSelect();
-                setSelectedRoute("enterprise");
+                updateRoute("enterprise");
               },
             },
           },
+          ...(showNoAgreementOption
+            ? [
+                {
+                  label:
+                    "Je ne souhaite pas renseigner ma convention collective.",
+                  nativeInputProps: {
+                    checked: selectedRoute === "no-agreement",
+                    onChange: () => {
+                      onAgreementSelect();
+                      updateRoute("no-agreement");
+                      emitClickP3(trackingActionName);
+                    },
+                  },
+                },
+              ]
+            : []),
         ]}
       />
       {selectedRoute === "agreement" && (
@@ -96,6 +128,7 @@ export const AgreementSearchForm = ({
           onBackToPersonalize={onBackToPersonalize}
         />
       )}
+      {selectedRoute === "no-agreement" && noAgreementContent}
     </>
   );
 };
diff --git a/packages/code-du-travail-frontend/src/modules/outils/indemnite-depart/types.ts b/packages/code-du-travail-frontend/src/modules/outils/indemnite-depart/types.ts
index 23e79ad966..842a4b8a3f 100644
--- a/packages/code-du-travail-frontend/src/modules/outils/indemnite-depart/types.ts
+++ b/packages/code-du-travail-frontend/src/modules/outils/indemnite-depart/types.ts
@@ -18,7 +18,11 @@ export type StoreSlicePublicodes<T extends object, E extends object = T> = (
   options: { simulator: PublicodesSimulator; type: IndemniteDepartType }
 ) => T;
 
-export type AgreementRoute = "not-selected" | "agreement" | "enterprise";
+export type AgreementRoute =
+  | "not-selected"
+  | "agreement"
+  | "enterprise"
+  | "no-agreement";
 
 export const STORAGE_KEY_AGREEMENT = "convention";