diff --git a/apps/infoalloggi/src/pages/auth/accetta-invito/[token].tsx b/apps/infoalloggi/src/pages/auth/accetta-invito/[token].tsx
index 2e32716..6de35cb 100644
--- a/apps/infoalloggi/src/pages/auth/accetta-invito/[token].tsx
+++ b/apps/infoalloggi/src/pages/auth/accetta-invito/[token].tsx
@@ -1,6 +1,13 @@
 "use client";
 
-import { ExternalLink, Eye, EyeOff, Frown, MailPlus } from "lucide-react";
+import {
+	ExternalLink,
+	Eye,
+	EyeOff,
+	Frown,
+	MailPlus,
+	UserSearch,
+} from "lucide-react";
 import type { GetServerSideProps } from "next";
 import Link from "next/link";
 import { useRouter } from "next/router";
@@ -38,25 +45,47 @@ import { useTranslation } from "~/providers/I18nProvider";
 import { generateSSGHelper } from "~/server/utils/ssgHelper";
 import { api } from "~/utils/api";
 
-type Valid = {
-	valid: true;
+type InviteTokenProps = {
 	token: string;
-	email: string;
+	verification:
+		| {
+				status: "valid";
+				email: string;
+		  }
+		| {
+				status: "invalid";
+				reason: "not_found" | "expired";
+		  }
+		| {
+				status: "already_user";
+		  };
 };
-type Invalid = {
-	valid: false;
-	token: null;
-	email: null;
-};
-type InviteTokenProps = Valid | Invalid;
+
 /**
  * Pagina di accettazione invito: /auth/accetta-invito/[token]
  */
 const AcceptInvitePage: NextPageWithLayout<InviteTokenProps> = ({
-	valid,
+	verification,
+	token,
+}: InviteTokenProps) => {
+	switch (verification.status) {
+		case "valid":
+			return <ValidInvitePage email={verification.email} token={token} />;
+		case "invalid":
+			return <InvalidInvitePage reason={verification.reason} />;
+		case "already_user":
+			return <AlreadyUserPage />;
+		default:
+			return <InvalidInvitePage reason="not_found" />;
+	}
+};
+const ValidInvitePage = ({
 	token,
 	email,
-}: InviteTokenProps) => {
+}: {
+	token: string;
+	email: string;
+}) => {
 	const {
 		isVisible,
 		getStrengthColor,
@@ -91,7 +120,6 @@ const AcceptInvitePage: NextPageWithLayout<InviteTokenProps> = ({
 			newPsw: "",
 		},
 	});
-
 	function onSubmit(fields: FormValues) {
 		if (!email || !token) return;
 		acceptInvite({
@@ -112,27 +140,6 @@ const AcceptInvitePage: NextPageWithLayout<InviteTokenProps> = ({
 				toast.error(error.message);
 			},
 		});
-
-	if (!valid) {
-		return (
-			<div className="flex flex-1 flex-col items-center justify-center gap-2 text-center">
-				<Frown className="mx-auto mb-4 size-28 text-muted-foreground" />
-
-				<h1 className="font-bold text-xl">Invito non valido</h1>
-				<p>L'invito è scaduto o è già stato utilizzato.</p>
-				<div className="flex flex-col items-center gap-4 pt-4 md:flex-row">
-					<Link href="/login">
-						<Button variant="info">
-							<span>Vai al Login</span>
-							<ExternalLink />
-						</Button>
-					</Link>
-					<NewInviteDialog />
-				</div>
-			</div>
-		);
-	}
-
 	return (
 		<div className="mx-auto w-full max-w-lg space-y-10 py-6 md:py-10">
 			<div className="flex w-full items-center justify-center">
@@ -221,6 +228,42 @@ const AcceptInvitePage: NextPageWithLayout<InviteTokenProps> = ({
 		</div>
 	);
 };
+const AlreadyUserPage = () => {
+	return (
+		<div className="flex flex-1 flex-col items-center justify-center gap-2 text-center">
+			<UserSearch className="mx-auto mb-4 size-28 text-muted-foreground" />
+			<h1 className="font-bold text-xl">Utente già registrato</h1>
+			<p>L'email associata a questo invito è già registrata.</p>
+			<div className="flex flex-col items-center gap-4 pt-4 md:flex-row">
+				<Link href="/login">
+					<Button size="lg" variant="info">
+						<span>Vai al Login</span>
+						<ExternalLink />
+					</Button>
+				</Link>
+			</div>
+		</div>
+	);
+};
+
+const InvalidInvitePage = ({ reason }: { reason: "not_found" | "expired" }) => {
+	const message =
+		reason === "expired"
+			? "L'invito è scaduto, è passato troppo tempo dall'invio."
+			: "Non è stato trovato alcun invito valido per questo collegamento.";
+
+	return (
+		<div className="flex flex-1 flex-col items-center justify-center gap-2 text-center">
+			<Frown className="mx-auto mb-4 size-28 text-muted-foreground" />
+
+			<h1 className="font-bold text-xl">Invito non valido</h1>
+			<p>{message}</p>
+			<div className="flex flex-col items-center gap-4 pt-4 md:flex-row">
+				<NewInviteDialog />
+			</div>
+		</div>
+	);
+};
 
 const NewInviteDialog = () => {
 	const { t } = useTranslation();
@@ -244,7 +287,7 @@ const NewInviteDialog = () => {
 	return (
 		<AlertDialog onOpenChange={setOpen} open={open}>
 			<AlertDialogTrigger asChild>
-				<Button>
+				<Button size="lg">
 					<span>Richiedi un nuovo invito</span>
 					<MailPlus />
 				</Button>
@@ -297,24 +340,24 @@ export const getServerSideProps = (async (context) => {
 			},
 		};
 	}
+	const e = context.query.e;
+	let email: string | null = null;
+	if (typeof e === "string") {
+		try {
+			email = atob(e);
+		} catch {
+			email = null;
+		}
+	}
+
 	const helper = generateSSGHelper();
 
-	const valid = await helper.invite.verifyInvite.fetch({ token });
+	const verification = await helper.invite.verifyInvite.fetch({ token, email });
 
-	if (valid.valid) {
-		return {
-			props: {
-				valid: true,
-				token,
-				email: valid.email as string,
-			},
-		};
-	}
 	return {
 		props: {
-			valid: false,
-			token: null,
-			email: null,
+			verification,
+			token,
 		},
 	};
 }) satisfies GetServerSideProps<InviteTokenProps>;
diff --git a/apps/infoalloggi/src/server/api/routers/invite.ts b/apps/infoalloggi/src/server/api/routers/invite.ts
index 240a780..f30831a 100644
--- a/apps/infoalloggi/src/server/api/routers/invite.ts
+++ b/apps/infoalloggi/src/server/api/routers/invite.ts
@@ -33,7 +33,7 @@ export const inviteRouter = createTRPCRouter({
 
 				const token = await createInviteToken(user.email);
 
-				const inviteUrl = `${env.BASE_URL}/auth/accetta-invito/${token}`;
+				const inviteUrl = `${env.BASE_URL}/auth/accetta-invito/${token}?e=${btoa(user.email)}`;
 
 				await sendInvitoEmail({
 					userId: input.id,
@@ -66,7 +66,7 @@ export const inviteRouter = createTRPCRouter({
 				}
 
 				const token = await createInviteToken(user.email);
-				const inviteUrl = `${env.BASE_URL}/auth/accetta-invito/${token}`;
+				const inviteUrl = `${env.BASE_URL}/auth/accetta-invito/${token}?e=${btoa(user.email)}`;
 
 				await sendInvitoEmail({
 					userId: user.id,
@@ -89,21 +89,32 @@ export const inviteRouter = createTRPCRouter({
 
 	// Verify invite token (public - user clicking the link)
 	verifyInvite: publicProcedure
-		.input(z.object({ token: z.string() }))
+		.input(z.object({ token: z.string(), email: z.string().nullable() }))
 		.output(
-			z.discriminatedUnion("valid", [
-				z.object({ valid: z.literal(true), email: z.email() }),
-				z.object({ valid: z.literal(false), email: z.null() }),
+			z.discriminatedUnion("status", [
+				z.object({ status: z.literal("valid"), email: z.email() }),
+				z.object({
+					status: z.literal("invalid"),
+					reason: z.enum(["not_found", "expired"]),
+				}),
+				z.object({ status: z.literal("already_user") }),
 			]),
 		)
 		.query(async ({ input }) => {
-			const invite = await verifyInviteToken(input.token);
-
-			if (!invite) {
-				return { valid: false, email: null };
+			if (input.email) {
+				const existingUser = await findUser_byEmail({ email: input.email });
+				if (existingUser) {
+					return { status: "already_user" };
+				}
 			}
 
-			return { valid: true, email: invite.email };
+			const ver = await verifyInviteToken(input.token);
+
+			if (!ver.status) {
+				return { status: "invalid", reason: ver.reason };
+			}
+
+			return { status: "valid", email: ver.invite.email };
 		}),
 
 	// Accept invite and set password
@@ -123,9 +134,9 @@ export const inviteRouter = createTRPCRouter({
 					message: `Accept Invite: Utente non trovato con email: ${input.email}`,
 				});
 			}
-			const invite = await verifyInviteToken(input.token);
+			const ver = await verifyInviteToken(input.token);
 
-			if (!invite) {
+			if (!ver.status) {
 				throw new TRPCError({
 					code: "NOT_FOUND",
 					message: `Accept Invite: Invito non valido o scaduto per email: ${input.email}`,
diff --git a/apps/infoalloggi/src/server/controllers/invites.controller.ts b/apps/infoalloggi/src/server/controllers/invites.controller.ts
index c25054e..afcef70 100644
--- a/apps/infoalloggi/src/server/controllers/invites.controller.ts
+++ b/apps/infoalloggi/src/server/controllers/invites.controller.ts
@@ -1,5 +1,6 @@
 import crypto from "node:crypto";
 import { TRPCError } from "@trpc/server";
+import type { UserInvites } from "~/schemas/public/UserInvites";
 import type { UsersId } from "~/schemas/public/Users";
 import { db } from "~/server/db";
 import { NewMail } from "../services/mailer";
@@ -31,18 +32,33 @@ export async function createInviteToken(email: string) {
 	return token;
 }
 
-export async function verifyInviteToken(token: string) {
+type VerifyInviteResult =
+	| {
+			status: true;
+			invite: UserInvites;
+	  }
+	| {
+			status: false;
+			reason: "not_found" | "expired";
+	  };
+export async function verifyInviteToken(
+	token: string,
+): Promise<VerifyInviteResult> {
 	try {
 		const invite = await db
 			.selectFrom("user_invites")
-			.selectAll()
+			.selectAll("user_invites")
 			.where("token", "=", token)
-			.where("expires_at", ">", new Date())
+			//.where("expires_at", ">", new Date())
 			.executeTakeFirst();
 		if (!invite) {
-			return null;
+			return { status: false, reason: "not_found" };
 		}
-		return invite;
+		if (invite.expires_at < new Date()) {
+			return { status: false, reason: "expired" };
+		}
+
+		return { status: true, invite };
 	} catch (e) {
 		console.error("Error verifying invite token:", e);
 		throw new TRPCError({