diff --git a/src/features/TakeNow/ui/ValidateTakeNowParams.tsx b/src/features/TakeNow/ui/ValidateTakeNowParams.tsx
index 5858ff023..e41d1f5ff 100644
--- a/src/features/TakeNow/ui/ValidateTakeNowParams.tsx
+++ b/src/features/TakeNow/ui/ValidateTakeNowParams.tsx
@@ -14,7 +14,8 @@ function ValidateTakeNowParams({
   respondentId,
 }: TakeNowParams) {
   const { showErrorNotification } = useNotification();
-  const { initiateTakeNow, isInMultiInformantFlow } = appletModel.hooks.useMultiInformantState();
+  const { initiateTakeNow, isInMultiInformantFlow, getMultiInformantState } =
+    appletModel.hooks.useMultiInformantState();
 
   const { isError, isLoading, isSuccess, error, data } = useTakeNowValidation({
     appletId,
@@ -27,7 +28,12 @@ function ValidateTakeNowParams({
     if (isSuccess && data) {
       const { sourceSubjectId, targetSubjectId } = data;
 
-      if (!isInMultiInformantFlow()) {
+      const multiInformantState = getMultiInformantState();
+      if (
+        !isInMultiInformantFlow() ||
+        sourceSubjectId !== multiInformantState.sourceSubjectId ||
+        targetSubjectId !== multiInformantState.targetSubjectId
+      ) {
         initiateTakeNow({ sourceSubjectId, targetSubjectId });
       }
     }
diff --git a/src/shared/api/types/activity.ts b/src/shared/api/types/activity.ts
index bdd166d28..f1ac7db7b 100644
--- a/src/shared/api/types/activity.ts
+++ b/src/shared/api/types/activity.ts
@@ -92,6 +92,8 @@ export type AnswerPayload = {
     localEndDate: string;
     localEndTime: string;
   };
+  sourceSubjectId?: ID | null;
+  targetSubjectId?: ID | null;
 };
 
 export type AlertDTO = {
diff --git a/src/widgets/ActivityDetails/model/hooks/useAnswers.ts b/src/widgets/ActivityDetails/model/hooks/useAnswers.ts
index 05a3e13f4..0ea38fae8 100644
--- a/src/widgets/ActivityDetails/model/hooks/useAnswers.ts
+++ b/src/widgets/ActivityDetails/model/hooks/useAnswers.ts
@@ -14,6 +14,7 @@ import { appletModel } from '~/entities/applet';
 import { userModel } from '~/entities/user';
 import { AnswerPayload, AppletDetailsDTO, AppletEventsResponse } from '~/shared/api';
 import { formatToDtoDate, formatToDtoTime, useEncryption } from '~/shared/utils';
+import { useLaunchDarkly } from '~/shared/utils/hooks/useLaunchDarkly';
 
 type Props = {
   applet: AppletDetailsDTO;
@@ -36,6 +37,9 @@ export const useAnswer = (props: Props) => {
   const { encryptPayload } = useEncryptPayload();
 
   const { getGroupProgress } = appletModel.hooks.useGroupProgressState();
+  const { getMultiInformantState, isInMultiInformantFlow } =
+    appletModel.hooks.useMultiInformantState();
+  const { flags: featureFlags } = useLaunchDarkly();
 
   const getSubmitId = (groupInProgress: GroupProgress): string => {
     const isFlow = groupInProgress.type === ActivityPipelineType.Flow;
@@ -135,6 +139,14 @@ export const useAnswer = (props: Props) => {
         },
       };
 
+      if (featureFlags.enableMultiInformant) {
+        const multiInformantState = getMultiInformantState();
+        if (isInMultiInformantFlow()) {
+          answer.sourceSubjectId = multiInformantState.sourceSubjectId;
+          answer.targetSubjectId = multiInformantState.targetSubjectId;
+        }
+      }
+
       const scheduledTime = getScheduledTimeFromEvents(props.eventsRawData, props.activityId);
       if (scheduledTime) {
         answer.answer.scheduledTime = scheduledTime;
@@ -154,6 +166,7 @@ export const useAnswer = (props: Props) => {
       props.eventId,
       props.eventsRawData,
       props.flowId,
+      getMultiInformantState,
     ],
   );