diff --git a/apps/hackathon/src/app/teams/[teamId]/members/page.tsx b/apps/hackathon/src/app/teams/[teamId]/members/page.tsx
index a0276ea..4987873 100644
--- a/apps/hackathon/src/app/teams/[teamId]/members/page.tsx
+++ b/apps/hackathon/src/app/teams/[teamId]/members/page.tsx
@@ -15,6 +15,7 @@ import {
 } from '@imphnen-frontend-service/service';
 import { useForm } from 'react-hook-form';
 import { zodResolver } from '@hookform/resolvers/zod';
+import { toast } from 'sonner';
 
 const ManageMembersPage: FC = (): ReactElement => {
   const { teamId } = useParams<{ teamId: string }>();
@@ -75,16 +76,20 @@ const ManageMembersPage: FC = (): ReactElement => {
   const handleApproveRequest = async (requestId: string) => {
     try {
       await respondToRequest({ requestId, action: 'approve' });
+      toast.success('Member added successfully!');
     } catch (error) {
       console.error('Failed to approve request:', error);
+      toast.error((error as Error).message || 'Failed to approve request');
     }
   };
 
   const handleRejectRequest = async (requestId: string) => {
     try {
       await respondToRequest({ requestId, action: 'reject' });
+      toast.success('Request rejected');
     } catch (error) {
       console.error('Failed to reject request:', error);
+      toast.error((error as Error).message || 'Failed to reject request');
     }
   };
 
diff --git a/libs/service/src/hooks/teams/index.ts b/libs/service/src/hooks/teams/index.ts
index cf3be09..32b014e 100644
--- a/libs/service/src/hooks/teams/index.ts
+++ b/libs/service/src/hooks/teams/index.ts
@@ -442,7 +442,17 @@ export const useRespondToJoinRequest = (teamId: string) => {
             .update({ status: 'pending' })
             .eq('id', requestId);
 
-          throw new Error('Failed to add member to team: ' + memberError.message);
+          // Parse Supabase error for user-friendly message
+          let errorMsg = memberError.message;
+          if (errorMsg.includes('Team already has 5 members') || errorMsg.includes('Team cannot have more than 5 members')) {
+            errorMsg = 'Team is full! Maximum 5 members allowed.';
+          } else if (errorMsg.includes('already in a team') || errorMsg.includes('User is already in a team')) {
+            errorMsg = 'This user is already in another team.';
+          } else if (errorMsg.includes('Bulk insert')) {
+            errorMsg = 'Invalid operation detected.';
+          }
+
+          throw new Error(errorMsg);
         }
 
         return { success: true, action: 'accepted' };