diff --git a/keyserver/src/responders/user-responders.js b/keyserver/src/responders/user-responders.js
--- a/keyserver/src/responders/user-responders.js
+++ b/keyserver/src/responders/user-responders.js
@@ -4,7 +4,7 @@
 import t from 'tcomb';
 import bcrypt from 'twin-bcrypt';
 
-import { policies } from 'lib/facts/policies.js';
+import { policies, policyTypes } from 'lib/facts/policies.js';
 import { hasMinCodeVersion } from 'lib/shared/version-utils';
 import type {
   ResetPasswordRequest,
@@ -66,7 +66,7 @@
 } from '../updaters/account-updaters';
 import { userSubscriptionUpdater } from '../updaters/user-subscription-updaters';
 import { viewerAcknowledgmentUpdater } from '../updaters/viewer-acknowledgment-updater.js';
-import { validateInput } from '../utils/validation-utils';
+import { policiesValidator, validateInput } from '../utils/validation-utils';
 import {
   entryQueryInputValidator,
   newEntryQueryInputValidator,
@@ -290,6 +290,15 @@
   if (rawEntryInfos) {
     response.rawEntryInfos = rawEntryInfos;
   }
+
+  try {
+    await policiesValidator(viewer, [policyTypes.tosAndPrivacyPolicy]);
+  } catch (error) {
+    if (error.message === 'policies_not_accepted') {
+      response.notAcknowledgedPolicies = error.payload.notAcknowledgedPolicies;
+    }
+  }
+
   return response;
 }
 
diff --git a/lib/actions/user-actions.js b/lib/actions/user-actions.js
--- a/lib/actions/user-actions.js
+++ b/lib/actions/user-actions.js
@@ -147,6 +147,7 @@
     userInfos,
     updatesCurrentAsOf: response.serverTime,
     logInActionSource: logInInfo.logInActionSource,
+    notAcknowledgedPolicies: response.notAcknowledgedPolicies,
   };
 };
 
diff --git a/lib/hooks/log-in-call.js b/lib/hooks/log-in-call.js
new file mode 100644
--- /dev/null
+++ b/lib/hooks/log-in-call.js
@@ -0,0 +1,35 @@
+// @flow
+
+import * as React from 'react';
+import { useDispatch } from 'react-redux';
+
+import { logIn } from '../actions/user-actions.js';
+import type { LogInInfo, LogInResult } from '../types/account-types.js';
+import { forcePolicyAcknowledgmentActionType } from '../types/policy-types.js';
+import { useServerCall } from '../utils/action-utils.js';
+
+function useLogInServerCall(): (logInInfo: LogInInfo) => Promise<LogInResult> {
+  const dispatch = useDispatch();
+  const callLogIn = useServerCall(logIn);
+
+  return React.useCallback(
+    async (logInInfo: LogInInfo) => {
+      const result = await callLogIn(logInInfo);
+      if (
+        result.notAcknowledgedPolicies &&
+        result.notAcknowledgedPolicies.length
+      ) {
+        dispatch({
+          type: forcePolicyAcknowledgmentActionType,
+          payload: {
+            notAcknowledgedPolicies: result.notAcknowledgedPolicies,
+          },
+        });
+      }
+      return result;
+    },
+    [callLogIn, dispatch],
+  );
+}
+
+export { useLogInServerCall };
diff --git a/lib/types/account-types.js b/lib/types/account-types.js
--- a/lib/types/account-types.js
+++ b/lib/types/account-types.js
@@ -129,6 +129,7 @@
     threadInfos: { +[id: string]: RawThreadInfo },
     userInfos: $ReadOnlyArray<UserInfo>,
   },
+  notAcknowledgedPolicies?: $ReadOnlyArray<PolicyType>,
 };
 
 export type LogInResult = {
@@ -139,6 +140,7 @@
   +calendarResult: CalendarResult,
   +updatesCurrentAsOf: number,
   +logInActionSource: LogInActionSource,
+  +notAcknowledgedPolicies?: $ReadOnlyArray<PolicyType>,
 };
 
 export type UpdatePasswordRequest = {
diff --git a/native/account/log-in-panel.react.js b/native/account/log-in-panel.react.js
--- a/native/account/log-in-panel.react.js
+++ b/native/account/log-in-panel.react.js
@@ -5,7 +5,8 @@
 import { View, StyleSheet, Alert, Keyboard, Platform } from 'react-native';
 import Animated from 'react-native-reanimated';
 
-import { logInActionTypes, logIn } from 'lib/actions/user-actions';
+import { logInActionTypes } from 'lib/actions/user-actions';
+import { useLogInServerCall } from 'lib/hooks/log-in-call';
 import { createLoadingStatusSelector } from 'lib/selectors/loading-selectors';
 import {
   validEmailRegex,
@@ -20,7 +21,6 @@
 } from 'lib/types/account-types';
 import type { LoadingStatus } from 'lib/types/loading-types';
 import {
-  useServerCall,
   useDispatchActionPromise,
   type DispatchActionPromise,
 } from 'lib/utils/action-utils';
@@ -366,7 +366,7 @@
     );
 
     const dispatchActionPromise = useDispatchActionPromise();
-    const callLogIn = useServerCall(logIn);
+    const callLogIn = useLogInServerCall();
 
     return (
       <LogInPanel
diff --git a/web/account/log-in-form.react.js b/web/account/log-in-form.react.js
--- a/web/account/log-in-form.react.js
+++ b/web/account/log-in-form.react.js
@@ -3,8 +3,9 @@
 import invariant from 'invariant';
 import * as React from 'react';
 
-import { logInActionTypes, logIn } from 'lib/actions/user-actions';
+import { logInActionTypes } from 'lib/actions/user-actions';
 import { useModalContext } from 'lib/components/modal-provider.react';
+import { useLogInServerCall } from 'lib/hooks/log-in-call.js';
 import { createLoadingStatusSelector } from 'lib/selectors/loading-selectors';
 import {
   oldValidUsernameRegex,
@@ -15,10 +16,7 @@
   type LogInStartingPayload,
   logInActionSources,
 } from 'lib/types/account-types';
-import {
-  useDispatchActionPromise,
-  useServerCall,
-} from 'lib/utils/action-utils';
+import { useDispatchActionPromise } from 'lib/utils/action-utils';
 
 import Button from '../components/button.react';
 import LoadingIndicator from '../loading-indicator.react';
@@ -32,7 +30,7 @@
 function LoginForm(): React.Node {
   const inputDisabled = useSelector(loadingStatusSelector) === 'loading';
   const loginExtraInfo = useSelector(webLogInExtraInfoSelector);
-  const callLogIn = useServerCall(logIn);
+  const callLogIn = useLogInServerCall();
   const dispatchActionPromise = useDispatchActionPromise();
   const modalContext = useModalContext();