diff --git a/src/backend/accounts/meta.ts b/src/backend/accounts/meta.ts
index ec6b94be..0886dc11 100644
--- a/src/backend/accounts/meta.ts
+++ b/src/backend/accounts/meta.ts
@@ -5,6 +5,7 @@ export interface MetaResponse {
   name: string;
   description?: string;
   hasCaptcha: boolean;
+  captchaClientKey?: string;
 }
 
 export async function getBackendMeta(url: string): Promise<MetaResponse> {
diff --git a/src/components/PassphraseDisplay.tsx b/src/components/PassphraseDisplay.tsx
index c0567854..660418d1 100644
--- a/src/components/PassphraseDisplay.tsx
+++ b/src/components/PassphraseDisplay.tsx
@@ -1,5 +1,5 @@
 import { useRef, useState } from "react";
-import { useCopyToClipboard } from "react-use";
+import { useCopyToClipboard, useMountedState } from "react-use";
 
 import { Icon, Icons } from "./Icon";
 
@@ -9,6 +9,7 @@ export function PassphaseDisplay(props: { mnemonic: string }) {
   const [, copy] = useCopyToClipboard();
 
   const [hasCopied, setHasCopied] = useState(false);
+  const isMounted = useMountedState();
 
   const timeout = useRef<ReturnType<typeof setTimeout>>();
 
@@ -16,7 +17,7 @@ export function PassphaseDisplay(props: { mnemonic: string }) {
     copy(props.mnemonic);
     setHasCopied(true);
     if (timeout.current) clearTimeout(timeout.current);
-    timeout.current = setTimeout(() => setHasCopied(false), 500);
+    timeout.current = setTimeout(() => isMounted() && setHasCopied(false), 500);
   }
 
   return (
diff --git a/src/hooks/auth/useAuth.ts b/src/hooks/auth/useAuth.ts
index 2024b4d5..8fb184c0 100644
--- a/src/hooks/auth/useAuth.ts
+++ b/src/hooks/auth/useAuth.ts
@@ -19,7 +19,7 @@ import { useBackendUrl } from "@/hooks/auth/useBackendUrl";
 import { useAuthStore } from "@/stores/auth";
 
 export interface RegistrationData {
-  recaptchaToken: string;
+  recaptchaToken?: string;
   mnemonic: string;
   userData: {
     device: string;
diff --git a/src/pages/Register.tsx b/src/pages/Register.tsx
index e7458f0a..f257f12b 100644
--- a/src/pages/Register.tsx
+++ b/src/pages/Register.tsx
@@ -1,6 +1,7 @@
 import { useState } from "react";
 import { GoogleReCaptchaProvider } from "react-google-recaptcha-v3";
 
+import { MetaResponse } from "@/backend/accounts/meta";
 import { SubPageLayout } from "@/pages/layouts/SubPageLayout";
 import {
   AccountCreatePart,
@@ -9,20 +10,38 @@ import {
 import { PassphraseGeneratePart } from "@/pages/parts/auth/PassphraseGeneratePart";
 import { TrustBackendPart } from "@/pages/parts/auth/TrustBackendPart";
 import { VerifyPassphrase } from "@/pages/parts/auth/VerifyPassphrasePart";
-import { conf } from "@/setup/config";
+
+function CaptchaProvider(props: {
+  siteKey: string | null;
+  children: JSX.Element;
+}) {
+  if (!props.siteKey) return props.children;
+  return (
+    <GoogleReCaptchaProvider reCaptchaKey={props.siteKey}>
+      {props.children}
+    </GoogleReCaptchaProvider>
+  );
+}
 
 export function RegisterPage() {
   const [step, setStep] = useState(0);
   const [mnemonic, setMnemonic] = useState<null | string>(null);
   const [account, setAccount] = useState<null | AccountProfile>(null);
-  const reCaptchaKey = conf().RECAPTCHA_SITE_KEY;
+  const [siteKey, setSiteKey] = useState<string | null>(null);
+
+  // TODO because of user data loading (in useAuthRestore()), the register page gets unmounted before finishing the register flow
 
   return (
-    <GoogleReCaptchaProvider reCaptchaKey={reCaptchaKey}>
+    <CaptchaProvider siteKey={siteKey}>
       <SubPageLayout>
         {step === 0 ? (
           <TrustBackendPart
-            onNext={() => {
+            onNext={(meta: MetaResponse) => {
+              setSiteKey(
+                meta.hasCaptcha && meta.captchaClientKey
+                  ? meta.captchaClientKey
+                  : null
+              );
               setStep(1);
             }}
           />
@@ -45,6 +64,7 @@ export function RegisterPage() {
         ) : null}
         {step === 3 ? (
           <VerifyPassphrase
+            hasCaptcha={!!siteKey}
             mnemonic={mnemonic}
             userData={account}
             onNext={() => {
@@ -54,6 +74,6 @@ export function RegisterPage() {
         ) : null}
         {step === 4 ? <p>Success, account now exists</p> : null}
       </SubPageLayout>
-    </GoogleReCaptchaProvider>
+    </CaptchaProvider>
   );
 }
diff --git a/src/pages/parts/auth/VerifyPassphrasePart.tsx b/src/pages/parts/auth/VerifyPassphrasePart.tsx
index 270be190..34c3a52b 100644
--- a/src/pages/parts/auth/VerifyPassphrasePart.tsx
+++ b/src/pages/parts/auth/VerifyPassphrasePart.tsx
@@ -15,6 +15,7 @@ import { AccountProfile } from "@/pages/parts/auth/AccountCreatePart";
 
 interface VerifyPassphraseProps {
   mnemonic: string | null;
+  hasCaptcha?: boolean;
   userData: AccountProfile | null;
   onNext?: () => void;
 }
@@ -27,18 +28,20 @@ export function VerifyPassphrase(props: VerifyPassphraseProps) {
 
   const [result, execute] = useAsyncFn(
     async (inputMnemonic: string) => {
-      const recaptchaToken = executeRecaptcha
-        ? await executeRecaptcha()
-        : undefined;
-
       if (!props.mnemonic || !props.userData)
         throw new Error("Data is not valid");
-      if (!recaptchaToken) throw new Error("ReCaptcha validation failed");
+
+      let recaptchaToken: string | undefined;
+      if (props.hasCaptcha) {
+        recaptchaToken = executeRecaptcha
+          ? await executeRecaptcha()
+          : undefined;
+        if (!recaptchaToken) throw new Error("ReCaptcha validation failed");
+      }
+
       if (inputMnemonic !== props.mnemonic)
         throw new Error("Passphrase doesn't match");
 
-      // TODO captcha?
-
       await register({
         mnemonic: inputMnemonic,
         userData: props.userData,
diff --git a/src/setup/config.ts b/src/setup/config.ts
index ffc57ffa..36b63c2c 100644
--- a/src/setup/config.ts
+++ b/src/setup/config.ts
@@ -8,7 +8,6 @@ interface Config {
   CORS_PROXY_URL: string;
   NORMAL_ROUTER: boolean;
   BACKEND_URL: string;
-  RECAPTCHA_SITE_KEY: string;
 }
 
 export interface RuntimeConfig {
@@ -19,7 +18,6 @@ export interface RuntimeConfig {
   NORMAL_ROUTER: boolean;
   PROXY_URLS: string[];
   BACKEND_URL: string;
-  RECAPTCHA_SITE_KEY: string;
 }
 
 const env: Record<keyof Config, undefined | string> = {
@@ -30,7 +28,6 @@ const env: Record<keyof Config, undefined | string> = {
   CORS_PROXY_URL: import.meta.env.VITE_CORS_PROXY_URL,
   NORMAL_ROUTER: import.meta.env.VITE_NORMAL_ROUTER,
   BACKEND_URL: import.meta.env.VITE_BACKEND_URL,
-  RECAPTCHA_SITE_KEY: import.meta.env.VITE_RECAPTCHA_SITE_KEY,
 };
 
 // loads from different locations, in order: environment (VITE_{KEY}), window (public/config.js)
@@ -56,6 +53,5 @@ export function conf(): RuntimeConfig {
       .split(",")
       .map((v) => v.trim()),
     NORMAL_ROUTER: getKey("NORMAL_ROUTER", "false") === "true",
-    RECAPTCHA_SITE_KEY: getKey("RECAPTCHA_SITE_KEY"),
   };
 }