diff --git a/src/app/personside/infotabs/meldinger/traadvisning/verktoylinje/journalforing/JournalforSak.tsx b/src/app/personside/infotabs/meldinger/traadvisning/verktoylinje/journalforing/JournalforSak.tsx
index bec0fbfdd2..4df2a04c51 100644
--- a/src/app/personside/infotabs/meldinger/traadvisning/verktoylinje/journalforing/JournalforSak.tsx
+++ b/src/app/personside/infotabs/meldinger/traadvisning/verktoylinje/journalforing/JournalforSak.tsx
@@ -17,6 +17,8 @@ import dialogResource from '../../../../../../../rest/resources/dialogResource';
 import { useValgtenhet } from '../../../../../../../context/valgtenhet-state';
 import { useQueryClient } from '@tanstack/react-query';
 import journalsakResource from '../../../../../../../rest/resources/journalsakResource';
+import useFeatureToggle from '../../../../../../../components/featureToggle/useFeatureToggle';
+import { FeatureToggles } from '../../../../../../../components/featureToggle/toggleIDs';
 
 interface Props {
     sak: JournalforingsSak;
@@ -62,7 +64,13 @@ export function JournalforSak(props: Props) {
 
         setSubmitting(true);
         const enhetheader = valgtEnhet ? `?enhet=${valgtEnhet}` : '';
-        post(`${apiBaseUri}/journalforing/${fnr}/${props.traad.traadId}${enhetheader}`, props.sak, 'Journalføring')
+        const { isOn } = useFeatureToggle(FeatureToggles.IkkeFnrIPath);
+        const url = isOn
+            ? `${apiBaseUri}/v2/journalforing/${props.traad.traadId}${enhetheader}`
+            : `${apiBaseUri}/journalforing/${fnr}/${props.traad.traadId}${enhetheader}`;
+        const body = isOn ? { ...props.sak, fnr } : props.sak;
+
+        post(url, body, 'Journalføring')
             .then(() => {
                 setSubmitting(false);
                 setJournalforingSuksess(true);
diff --git "a/src/app/personside/infotabs/meldinger/traadvisning/verktoylinje/oppgave/useForesl\303\245tteEnheter.ts" "b/src/app/personside/infotabs/meldinger/traadvisning/verktoylinje/oppgave/useForesl\303\245tteEnheter.ts"
index b8e702eafe..5fe4172eab 100644
--- "a/src/app/personside/infotabs/meldinger/traadvisning/verktoylinje/oppgave/useForesl\303\245tteEnheter.ts"
+++ "b/src/app/personside/infotabs/meldinger/traadvisning/verktoylinje/oppgave/useForesl\303\245tteEnheter.ts"
@@ -2,9 +2,11 @@ import { useFodselsnummer } from '../../../../../../../utils/customHooks';
 import { useEffect, useMemo, useState } from 'react';
 import { Enhet } from '../../../../../../../models/meldinger/oppgave';
 import { loggError, loggEvent } from '../../../../../../../utils/logger/frontendLogger';
-import { apiBaseUri, includeCredentials } from '../../../../../../../api/config';
+import { apiBaseUri, includeCredentials, postConfig } from '../../../../../../../api/config';
 import { OppgaveSkjemaForm } from './oppgaveInterfaces';
 import { UseFormReturn } from 'react-hook-form';
+import useFeatureToggle from '../../../../../../../components/featureToggle/useFeatureToggle';
+import { FeatureToggles } from '../../../../../../../components/featureToggle/toggleIDs';
 
 function useForeslatteEnheter({ watch }: UseFormReturn<OppgaveSkjemaForm>) {
     const fnr = useFodselsnummer();
@@ -32,9 +34,13 @@ function useForeslatteEnheter({ watch }: UseFormReturn<OppgaveSkjemaForm>) {
             .map((entry) => entry[0] + '=' + entry[1])
             .join('&');
 
+        const { isOn } = useFeatureToggle(FeatureToggles.IkkeFnrIPath);
+        const fetchFn = isOn
+            ? fetch(`${apiBaseUri}/v2/enheter/oppgavebehandlere/v2/foreslatte`, postConfig(request))
+            : fetch(`${apiBaseUri}/enheter/oppgavebehandlere/v2/foreslatte?${queryParams}`, includeCredentials);
         setPending(true);
         loggEvent('Fetch', 'LagOppgave-ForeslåtteEnheter');
-        fetch(`${apiBaseUri}/enheter/oppgavebehandlere/v2/foreslatte?${queryParams}`, includeCredentials)
+        fetchFn
             .then((response) => response.json())
             .then(setForeslatteEnheter)
             .catch((e) => loggError(e, 'Feil ved henting av foreslåtte enheter'))
diff --git a/src/app/personside/infotabs/saksoversikt/dokumentvisning/SaksDokumentVisning.tsx b/src/app/personside/infotabs/saksoversikt/dokumentvisning/SaksDokumentVisning.tsx
index 136c1f7f76..23a5ca7490 100644
--- a/src/app/personside/infotabs/saksoversikt/dokumentvisning/SaksDokumentVisning.tsx
+++ b/src/app/personside/infotabs/saksoversikt/dokumentvisning/SaksDokumentVisning.tsx
@@ -10,6 +10,8 @@ import styled from 'styled-components';
 import { getMockableUrl } from './mockable-dokument-url';
 import { parseQueryString } from '../../../../../utils/url-utils';
 import { apiBaseUri } from '../../../../../api/config';
+import useFeatureToggle from '../../../../../components/featureToggle/useFeatureToggle';
+import { FeatureToggles } from '../../../../../components/featureToggle/toggleIDs';
 
 interface Props {
     fnr: string;
@@ -42,9 +44,12 @@ function DokumentVisning(props: Props) {
     }
 
     const url = getMockableUrl(byggDokumentVisningUrl(props.url, props.fnr));
+    const urlV2 = getMockableUrl(byggDokumentVisningUrlV2(props.url));
+
+    const { isOn } = useFeatureToggle(FeatureToggles.IkkeFnrIPath);
 
     return (
-        <ObjectHttpFeilHandtering url={url} width="100%" height="100%" onError={onError}>
+        <ObjectHttpFeilHandtering url={isOn ? urlV2 : url} fnr={props.fnr} width="100%" height="100%" onError={onError}>
             <ErrorStyle>
                 <AlertStripeAdvarsel>{errMsg}</AlertStripeAdvarsel>
             </ErrorStyle>
@@ -57,6 +62,11 @@ function byggDokumentVisningUrl(url: string, fodselsnummer: string): string {
     return `${apiBaseUri}/saker/${fodselsnummer}/dokument/${journalpost}/${dokument}`;
 }
 
+function byggDokumentVisningUrlV2(url: string): string {
+    const { journalpost, dokument } = parseQueryString<{ journalpost: string; dokument: string }>(url); // Format til url: 'journalpost=etcoicxr&dokument=q90p8dnw'
+    return `${apiBaseUri}/v2/saker/dokument/${journalpost}/${dokument}`;
+}
+
 function feilmelding(statusKode: number) {
     switch (statusKode) {
         case 401:
diff --git a/src/components/ObjectHttpFeilHandtering.tsx b/src/components/ObjectHttpFeilHandtering.tsx
index aedf47cbfe..0993b6c01f 100644
--- a/src/components/ObjectHttpFeilHandtering.tsx
+++ b/src/components/ObjectHttpFeilHandtering.tsx
@@ -1,38 +1,46 @@
 import * as React from 'react';
 import { ReactNode, useEffect, useState } from 'react';
 import { CenteredLazySpinner } from './LazySpinner';
+import useFeatureToggle from './featureToggle/useFeatureToggle';
+import { FeatureToggles } from './featureToggle/toggleIDs';
+import { postConfig } from '../api/config';
 
 export type Omit<T, U> = Pick<T, Exclude<keyof T, U>>;
 interface Props
     extends Omit<React.DetailedHTMLProps<React.ObjectHTMLAttributes<HTMLObjectElement>, HTMLObjectElement>, 'onError'> {
     url: string;
+    fnr: string;
     onError: (status: number) => void;
     children: ReactNode;
 }
 
-export function ObjectHttpFeilHandtering({ url, onError, children, ...rest }: Props) {
+export function ObjectHttpFeilHandtering({ url, fnr, onError, children, ...rest }: Props) {
     const [blobUrl, setBlobUrl] = useState('');
     const [contentType, setContentType] = useState('');
     const [isError, setError] = useState(false);
 
+    const { isOn } = useFeatureToggle(FeatureToggles.IkkeFnrIPath);
+
     useEffect(() => {
         let objectUrl = '';
-        fetch(url)
-            .then((res) => {
-                if (!res.ok) {
-                    setError(true);
-                    onError(res.status);
-                } else {
-                    setContentType(res.headers.get('Content-Type') ?? 'application/pdf');
-                    setError(false);
-                }
-                return res.blob();
-            })
-            .then((blob) => {
-                objectUrl = URL.createObjectURL(blob);
-
-                setBlobUrl(objectUrl);
-            });
+        isOn
+            ? fetch(url, postConfig(fnr))
+            : fetch(url)
+                  .then((res) => {
+                      if (!res.ok) {
+                          setError(true);
+                          onError(res.status);
+                      } else {
+                          setContentType(res.headers.get('Content-Type') ?? 'application/pdf');
+                          setError(false);
+                      }
+                      return res.blob();
+                  })
+                  .then((blob) => {
+                      objectUrl = URL.createObjectURL(blob);
+
+                      setBlobUrl(objectUrl);
+                  });
 
         return () => {
             window.URL.revokeObjectURL(objectUrl);
diff --git a/src/mock/index.ts b/src/mock/index.ts
index 23a1dde26f..ab95fe56e0 100644
--- a/src/mock/index.ts
+++ b/src/mock/index.ts
@@ -88,6 +88,15 @@ function setupTilgangskontroll(mock: FetchMock) {
         )
     );
 
+    mock.post(
+        apiBaseUri + '/tilgang',
+        withDelayedResponse(
+            randomDelay(),
+            () => (Math.random() > 0.98 ? 400 : 200),
+            mockGeneratorMedFodselsnummer(tilgangskontrollMock)
+        )
+    );
+
     mock.post(
         apiBaseUri + '/v2/tilgang',
         withDelayedResponse(
@@ -132,6 +141,18 @@ function setupSaksoversiktMock(mock: FetchMock) {
             )
         )
     );
+
+    mock.post(
+        apiBaseUri + '/v2/saker/sakstema',
+        verify(
+            harEnhetIdSomQueryParam,
+            withDelayedResponse(
+                randomDelay(),
+                fodselsNummerErGyldigStatus,
+                mockGeneratorMedFodselsnummer(getMockSaksoversikt)
+            )
+        )
+    );
 }
 
 function setupSaksoversiktV2Mock(mock: FetchMock) {
@@ -146,6 +167,18 @@ function setupSaksoversiktV2Mock(mock: FetchMock) {
             )
         )
     );
+
+    mock.post(
+        apiBaseUri + '/v2/saker/v2/sakstema',
+        verify(
+            harEnhetIdSomQueryParam,
+            withDelayedResponse(
+                randomDelay(),
+                fodselsNummerErGyldigStatus,
+                mockGeneratorMedFodselsnummer(getMockSaksoversiktV2)
+            )
+        )
+    );
 }
 
 function setupSaksoversiktV3Mock(mock: FetchMock) {
@@ -313,6 +346,10 @@ function setupJournalforingMock(mock: FetchMock) {
         apiBaseUri + '/journalforing/:fnr/saker/',
         withDelayedResponse(randomDelay(), STATUS_OK, () => saker)
     );
+    mock.post(
+        apiBaseUri + '/v2/journalforing/saker/',
+        withDelayedResponse(randomDelay(), STATUS_OK, () => saker)
+    );
     mock.post(
         apiBaseUri + '/journalforing/:fnr/:traadId',
         verify(
@@ -320,6 +357,13 @@ function setupJournalforingMock(mock: FetchMock) {
             withDelayedResponse(randomDelay(), STATUS_OK, () => ({}))
         )
     );
+    mock.post(
+        apiBaseUri + '/v2/journalforing/:traadId',
+        verify(
+            harEnhetIdSomQueryParam,
+            withDelayedResponse(randomDelay(), STATUS_OK, () => ({}))
+        )
+    );
 }
 
 function opprettOppgaveMock(mock: FetchMock) {
diff --git a/src/rest/resources/journalsakResource.tsx b/src/rest/resources/journalsakResource.tsx
index c5377fae99..0907406f73 100644
--- a/src/rest/resources/journalsakResource.tsx
+++ b/src/rest/resources/journalsakResource.tsx
@@ -1,13 +1,19 @@
 import { apiBaseUri } from '../../api/config';
 import { useFodselsnummer } from '../../utils/customHooks';
 import { useQuery, useQueryClient, UseQueryResult } from '@tanstack/react-query';
-import { FetchError, get } from '../../api/api';
+import { FetchError, get, post } from '../../api/api';
 import { Result } from '../../app/personside/infotabs/meldinger/traadvisning/verktoylinje/journalforing/JournalforingPanel';
+import useFeatureToggle from '../../components/featureToggle/useFeatureToggle';
+import { FeatureToggles } from '../../components/featureToggle/toggleIDs';
 
 function url(fnr: string): string {
     return `${apiBaseUri}/journalforing/${fnr}/saker/`;
 }
 
+function urlV2(): string {
+    return `${apiBaseUri}/v2/journalforing/saker/`;
+}
+
 const resource = {
     queryKey(fnr: string) {
         return ['journalsak', fnr];
@@ -15,7 +21,8 @@ const resource = {
     usePrefetch() {
         const fnr = useFodselsnummer();
         const queryClient = useQueryClient();
-        queryClient.prefetchQuery(this.queryKey(fnr), () => get(url(fnr)));
+        const { isOn } = useFeatureToggle(FeatureToggles.IkkeFnrIPath);
+        queryClient.prefetchQuery(this.queryKey(fnr), () => (isOn ? post(urlV2(), { fnr }) : get(url(fnr))));
     },
     useFetch(): UseQueryResult<Result, FetchError> {
         const fnr = useFodselsnummer();
diff --git a/src/rest/resources/sakstemaResource.tsx b/src/rest/resources/sakstemaResource.tsx
index 3218878db6..21bf2632f4 100644
--- a/src/rest/resources/sakstemaResource.tsx
+++ b/src/rest/resources/sakstemaResource.tsx
@@ -36,7 +36,7 @@ function urlV2(fnr: string, enhet?: string) {
 
 function urlUtenFnrIPath(enhet?: string) {
     const header = enhet ? `?enhet=${enhet}` : '';
-    return `${apiBaseUri}/saker/sakstema/${header}`;
+    return `${apiBaseUri}/v2/saker/sakstema/${header}`;
 }
 
 function urlUtenFnrIPathV2(enhet?: string) {