diff --git a/backend/src/index.ts b/backend/src/index.ts
index 7c21904..733f4d9 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -701,12 +701,17 @@ async function getStatisticsOverview(period: ParsedPeriod, userId: string) {
         td.day,
         td.tracked_minutes,
         COALESCE(tdb.billed_minutes, 0)::int AS crm_billed_minutes,
-        tdb.billed_minutes IS NOT NULL AS has_crm_value
+        tdb.billed_minutes IS NOT NULL AS has_crm_value,
+        ack.acknowledged_at IS NOT NULL AS missing_crm_acknowledged
       FROM ticket_day td
       LEFT JOIN ticket_day_billings tdb
         ON tdb.ticket_id = td.ticket_id
        AND tdb.user_id = $3
        AND tdb.day = td.day
+      LEFT JOIN ticket_day_billing_acknowledgements ack
+        ON ack.ticket_id = td.ticket_id
+       AND ack.user_id = $3
+       AND ack.day = td.day
     ),
     session_group AS (
       SELECT
@@ -916,6 +921,7 @@ async function getStatisticsOverview(period: ParsedPeriod, userId: string) {
         FROM ticket_day_billing tdb
         JOIN session_base sb ON sb.ticket_id = tdb.ticket_id AND sb.day = tdb.day
         WHERE NOT tdb.has_crm_value
+          AND NOT tdb.missing_crm_acknowledged
         GROUP BY tdb.ticket_id, tdb.ticket_number, tdb.day, tdb.tracked_minutes, tdb.crm_billed_minutes
         ORDER BY tdb.day ASC, tdb.ticket_number ASC;
       `,
@@ -2560,9 +2566,71 @@ app.patch("/api/tickets/:ticketId/day-billings/:day", async (req, res) => {
     [ticketId, userId, day.start, billedMinutes]
   );
 
+  await query(
+    `
+      DELETE FROM ticket_day_billing_acknowledgements
+      WHERE ticket_id = $1
+        AND user_id = $2
+        AND day = $3::date;
+    `,
+    [ticketId, userId, day.start]
+  );
+
   res.json({ dayBilling: result.rows[0] });
 });
 
+app.patch("/api/tickets/:ticketId/day-billings/:day/acknowledgement", async (req, res) => {
+  const ticketId = parsePositiveInteger(req.params.ticketId, "ticketId");
+  const day = parseDay(req.params.day);
+  const acknowledged = req.body.acknowledged !== false;
+  const userId = currentUser(req).id;
+
+  const sessionResult = await query<{ id: string }>(
+    `
+      SELECT id
+      FROM sessions
+      WHERE ticket_id = $1
+        AND user_id = $2
+        AND (started_at AT TIME ZONE 'Europe/Berlin')::date = $3::date
+      LIMIT 1;
+    `,
+    [ticketId, userId, day.start]
+  );
+
+  if (sessionResult.rowCount === 0) {
+    res.status(404).json({ error: "No sessions found for this ticket and day" });
+    return;
+  }
+
+  if (!acknowledged) {
+    await query(
+      `
+        DELETE FROM ticket_day_billing_acknowledgements
+        WHERE ticket_id = $1
+          AND user_id = $2
+          AND day = $3::date;
+      `,
+      [ticketId, userId, day.start]
+    );
+
+    res.json({ acknowledged: false });
+    return;
+  }
+
+  const result = await query(
+    `
+      INSERT INTO ticket_day_billing_acknowledgements (ticket_id, user_id, day)
+      VALUES ($1, $2, $3::date)
+      ON CONFLICT (ticket_id, user_id, day)
+      DO UPDATE SET acknowledged_at = now()
+      RETURNING day::text AS day, acknowledged_at;
+    `,
+    [ticketId, userId, day.start]
+  );
+
+  res.json({ acknowledged: true, acknowledgement: result.rows[0] });
+});
+
 app.post("/api/periods/:periodType/:period/tickets/:ticketId/close", async (req, res) => {
   parsePeriod(req.params.periodType, req.params.period);
   parsePositiveInteger(req.params.ticketId, "ticketId");
diff --git a/backend/src/migrations.ts b/backend/src/migrations.ts
index 2cba532..d79ec81 100644
--- a/backend/src/migrations.ts
+++ b/backend/src/migrations.ts
@@ -295,6 +295,16 @@ export async function migrate() {
     );
   `);
 
+  await query(`
+    CREATE TABLE IF NOT EXISTS ticket_day_billing_acknowledgements (
+      ticket_id BIGINT NOT NULL REFERENCES tickets(id) ON DELETE CASCADE,
+      user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+      day DATE NOT NULL,
+      acknowledged_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+      PRIMARY KEY (ticket_id, user_id, day)
+    );
+  `);
+
   await ensureClosureOwnership("ticket_month_closures", "month", ["ticket_id", "month"], adminId);
   await ensureClosureOwnership("month_closures", "month", ["month"], adminId);
   await ensureClosureOwnership("ticket_day_closures", "day", ["ticket_id", "day"], adminId);
@@ -309,6 +319,7 @@ export async function migrate() {
   await query("CREATE INDEX IF NOT EXISTS idx_sessions_billing_status ON sessions(billing_status);");
   await query("CREATE INDEX IF NOT EXISTS idx_ticket_day_closures_day ON ticket_day_closures(day);");
   await query("CREATE INDEX IF NOT EXISTS idx_ticket_day_billings_user_day ON ticket_day_billings(user_id, day);");
+  await query("CREATE INDEX IF NOT EXISTS idx_ticket_day_billing_ack_user_day ON ticket_day_billing_acknowledgements(user_id, day);");
   await query("CREATE INDEX IF NOT EXISTS idx_recurring_billings_user_active ON recurring_billings(user_id, active);");
   await query("UPDATE recurring_billings SET active = true WHERE active = false;");
   await query(`
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 43faf96..4471ba8 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -688,7 +688,7 @@ export function App() {
           <QuickTimerStarter inputId="quick-ticket-number-mobile" onStartTimer={startQuickTimer} />
         </div>
         <main className="min-h-0 min-w-0 flex-1 overflow-x-hidden p-3 sm:p-4 md:p-5">
-          <div className="mx-auto w-full max-w-[1180px]">
+          <div className="mx-auto w-full max-w-screen-2xl">
             {route.page === "timer" ? (
               <TimerPage
                 timers={timers}
diff --git a/frontend/src/api.ts b/frontend/src/api.ts
index 1dc84b7..11703c2 100644
--- a/frontend/src/api.ts
+++ b/frontend/src/api.ts
@@ -284,6 +284,13 @@ export function updateTicketDayBilling(ticketId: string, day: string, billedMinu
   });
 }
 
+export function acknowledgeMissingTicketDayBilling(ticketId: string, day: string, acknowledged = true) {
+  return request(`/api/tickets/${ticketId}/day-billings/${day}/acknowledgement`, {
+    method: "PATCH",
+    body: JSON.stringify({ acknowledged })
+  });
+}
+
 export function getMonthOverview(month: string) {
   return getPeriodOverview("month", month);
 }
diff --git a/frontend/src/views/MonthlyClosePage.tsx b/frontend/src/views/MonthlyClosePage.tsx
index 76e005e..7c0bcef 100644
--- a/frontend/src/views/MonthlyClosePage.tsx
+++ b/frontend/src/views/MonthlyClosePage.tsx
@@ -1,5 +1,4 @@
 import {
-  AlertTriangle,
   CheckCircle2,
   ChevronLeft,
   ChevronRight,
@@ -9,7 +8,6 @@ import {
   Lock,
   LockOpen,
   Sparkles,
-  TrendingUp,
 } from "lucide-react";
 import { useEffect, useMemo, useRef, useState } from "react";
 import { toast } from "sonner";
@@ -18,8 +16,10 @@ import { Alert } from "@/components/ui/alert";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { Checkbox } from "@/components/ui/checkbox";
 import { Input } from "@/components/ui/input";
-import { closePeriod, getStatisticsOverview, reopenPeriod } from "../api";
+import { CopyTicketButton } from "@/components/CopyTicketButton";
+import { acknowledgeMissingTicketDayBilling, closePeriod, getStatisticsOverview, reopenPeriod } from "../api";
 import { currentMonth, formatDate, formatDateTime, formatMinutes } from "../format";
 import type { StatisticsCrmDay, StatisticsOpenSession, StatisticsOverview } from "../types";
 
@@ -60,32 +60,87 @@ function StatusCard({ label, value, detail, tone }: { label: string; value: stri
   );
 }
 
-function OpenSessionItem({ session, month, onNavigate }: { session: StatisticsOpenSession; month: string; onNavigate: (to: string) => void }) {
+type OpenTicketGroup = {
+  ticketId: string;
+  ticketNumber: string;
+  organizationName: string;
+  openCount: number;
+  totalMinutes: number;
+};
+
+function groupOpenSessions(sessions: StatisticsOpenSession[]) {
+  const groups = new Map<string, OpenTicketGroup>();
+
+  for (const session of sessions) {
+    const existing = groups.get(session.ticket_id);
+
+    if (existing) {
+      existing.openCount += 1;
+      existing.totalMinutes += session.rounded_minutes;
+      continue;
+    }
+
+    groups.set(session.ticket_id, {
+      ticketId: session.ticket_id,
+      ticketNumber: session.ticket_number,
+      organizationName: session.organization_name,
+      openCount: 1,
+      totalMinutes: session.rounded_minutes
+    });
+  }
+
+  return Array.from(groups.values()).sort((left, right) => left.ticketNumber.localeCompare(right.ticketNumber, "de", { numeric: true, sensitivity: "base" }));
+}
+
+function OpenTicketItem({ group, month, onNavigate }: { group: OpenTicketGroup; month: string; onNavigate: (to: string) => void }) {
   return (
-    <div className="grid gap-2 rounded-md border bg-background p-3 sm:grid-cols-[1fr_auto] sm:items-center">
+    <div className="flex min-h-32 flex-col justify-between gap-3 rounded-md border bg-background p-3">
       <div className="min-w-0">
         <div className="flex flex-wrap items-center gap-2">
-          <span className="font-medium">{session.ticket_number}</span>
-          <Badge variant="outline">{formatMinutes(session.rounded_minutes)}</Badge>
-          <Badge variant="warning">offen</Badge>
+          <span className="font-medium">{group.ticketNumber}</span>
+          <CopyTicketButton ticketNumber={group.ticketNumber} />
+          <Badge variant="warning">{group.openCount} offen</Badge>
         </div>
-        <p className="truncate text-sm text-muted-foreground">{session.organization_name}</p>
-        <p className="whitespace-pre-wrap text-sm">{session.activity}</p>
+        <p className="truncate text-sm text-muted-foreground">{group.organizationName}</p>
+        <p className={`text-sm font-medium ${trackedTextClass}`}>{formatMinutes(group.totalMinutes)} offen zu bewerten</p>
+      </div>
+      <div className="flex justify-end">
+        <Button variant="secondary" size="sm" onClick={() => onNavigate(`/analysis/month/${month}/tickets/${group.ticketId}`)}>
+          Ticket öffnen
+          <ExternalLink className="size-4" />
+        </Button>
       </div>
-      <Button variant="secondary" size="sm" onClick={() => onNavigate(`/analysis/month/${month}/tickets/${session.ticket_id}`)}>
-        Bewerten
-        <ExternalLink className="size-4" />
-      </Button>
     </div>
   );
 }
 
-function CrmDayItem({ item, onNavigate }: { item: StatisticsCrmDay; onNavigate: (to: string) => void }) {
+function CrmDayItem({
+  item,
+  acknowledging,
+  onAcknowledge,
+  onNavigate
+}: {
+  item: StatisticsCrmDay;
+  acknowledging: boolean;
+  onAcknowledge: (item: StatisticsCrmDay) => void;
+  onNavigate: (to: string) => void;
+}) {
   return (
-    <div className="grid gap-2 rounded-md border bg-background p-3 sm:grid-cols-[1fr_auto] sm:items-center">
+    <div className="flex min-h-32 flex-col justify-between gap-3 rounded-md border bg-background p-3">
       <div className="min-w-0">
         <div className="flex flex-wrap items-center gap-2">
+          <Checkbox
+            checked={acknowledging}
+            disabled={acknowledging}
+            aria-label="Zur Kenntnis genommen"
+            onCheckedChange={(checked) => {
+              if (checked) {
+                onAcknowledge(item);
+              }
+            }}
+          />
           <span className="font-medium">{item.ticket_number}</span>
+          <CopyTicketButton ticketNumber={item.ticket_number} />
           <Badge variant="outline">{formatDate(`${item.day}T00:00:00`)}</Badge>
         </div>
         <p className="truncate text-sm text-muted-foreground">{item.organization_name}</p>
@@ -95,10 +150,15 @@ function CrmDayItem({ item, onNavigate }: { item: StatisticsCrmDay; onNavigate:
           {typeof item.delta_minutes === "number" ? <span className="text-muted-foreground">Differenz {formatTeamspaceDelta(item.delta_minutes)}</span> : null}
         </p>
       </div>
-      <Button variant="ghost" size="sm" onClick={() => onNavigate(`/analysis/day/${item.day}/tickets/${item.ticket_id}`)}>
-        Tag öffnen
-        <ExternalLink className="size-4" />
-      </Button>
+      <div className="flex flex-wrap justify-end gap-2">
+        <Button variant="ghost" size="sm" disabled={acknowledging} onClick={() => onAcknowledge(item)}>
+          Zur Kenntnis
+        </Button>
+        <Button variant="secondary" size="sm" onClick={() => onNavigate(`/analysis/day/${item.day}/tickets/${item.ticket_id}`)}>
+          Tag öffnen
+          <ExternalLink className="size-4" />
+        </Button>
+      </div>
     </div>
   );
 }
@@ -109,6 +169,7 @@ export function MonthlyClosePage({ onNavigate }: MonthlyClosePageProps) {
   const [loading, setLoading] = useState(false);
   const [closing, setClosing] = useState(false);
   const [reopening, setReopening] = useState(false);
+  const [acknowledgingKeys, setAcknowledgingKeys] = useState<Set<string>>(() => new Set());
   const loadRequestId = useRef(0);
 
   async function load() {
@@ -181,17 +242,39 @@ export function MonthlyClosePage({ onNavigate }: MonthlyClosePageProps) {
     }
   }
 
+  async function acknowledgeMissingCrmDay(item: StatisticsCrmDay) {
+    const key = `${item.ticket_id}:${item.day}`;
+    setAcknowledgingKeys((current) => new Set(current).add(key));
+
+    try {
+      await acknowledgeMissingTicketDayBilling(item.ticket_id, item.day, true);
+      toast.success("Teamspace-Prüfung abgehakt", {
+        description: `${item.ticket_number} am ${formatDate(`${item.day}T00:00:00`)}`
+      });
+      await load();
+    } catch (error) {
+      toast.error("Konnte nicht abgehakt werden", {
+        description: error instanceof Error ? error.message : "Unbekannter Fehler"
+      });
+    } finally {
+      setAcknowledgingKeys((current) => {
+        const next = new Set(current);
+        next.delete(key);
+        return next;
+      });
+    }
+  }
+
   const openSessions = stats?.attention.openSessions ?? [];
   const missingCrmDays = stats?.attention.missingCrmDays ?? [];
-  const crmMismatches = stats?.attention.crmMismatches ?? [];
+  const openTicketGroups = useMemo(() => groupOpenSessions(openSessions), [openSessions]);
   const canClose = Boolean(stats && !stats.closed && stats.totals.sessions > 0 && openSessions.length === 0);
   const checklist = useMemo(
     () => [
-      { label: "Offene Bewertungen", count: openSessions.length, blocker: true },
-      { label: "Tage ohne Teamspace-Wert", count: missingCrmDays.length, blocker: false },
-      { label: "Teamspace-Differenzen", count: crmMismatches.length, blocker: false }
+      { label: "Offene Bewertungen", count: openSessions.length, detail: `${openTicketGroups.length} Ticket(s)`, blocker: true },
+      { label: "Tage ohne Teamspace-Wert", count: missingCrmDays.length, detail: "zur Kenntnisnahme", blocker: false }
     ],
-    [openSessions.length, missingCrmDays.length, crmMismatches.length]
+    [openSessions.length, openTicketGroups.length, missingCrmDays.length]
   );
 
   return (
@@ -236,22 +319,13 @@ export function MonthlyClosePage({ onNavigate }: MonthlyClosePageProps) {
           <CheckCircle2 className="size-4 shrink-0" />
           <span>Dieser Monat wurde am {formatDateTime(stats.closedAt!)} abgeschlossen.</span>
         </Alert>
-      ) : openSessions.length > 0 ? (
-        <Alert variant="warning" className="flex items-center gap-2 py-3">
-          <AlertTriangle className="size-4 shrink-0" />
-          <span>{openSessions.length} offene Bewertung(en) blockieren den Monatsabschluss.</span>
-        </Alert>
-      ) : missingCrmDays.length > 0 || crmMismatches.length > 0 ? (
-        <Alert variant="warning" className="flex items-center gap-2 py-3">
-          <AlertTriangle className="size-4 shrink-0" />
-          <span>Der Monat ist abschließbar, hat aber noch Teamspace-Prüfpunkte.</span>
-        </Alert>
       ) : null}
 
-      <div className="grid gap-3 sm:grid-cols-2 xl:grid-cols-4">
+      <div className="grid gap-3 sm:grid-cols-2 xl:grid-cols-5">
         <StatusCard label="Sessions" value={stats?.totals.sessions ?? 0} detail={`${formatMinutes(stats?.totals.minutes ?? 0)} getrackt`} />
         <StatusCard label="Teamspace" value={formatMinutes(stats?.totals.crmBilledMinutes ?? 0)} detail={`Differenz ${formatTeamspaceDelta(stats?.totals.crmDeltaMinutes ?? 0)}`} />
-        <StatusCard label="Offen" value={openSessions.length} detail="blockiert den Abschluss" tone={openSessions.length > 0 ? "warn" : "ok"} />
+        <StatusCard label="Offene Bewertungen" value={openSessions.length} detail={`${openTicketGroups.length} Ticket(s)`} tone={openSessions.length > 0 ? "warn" : "ok"} />
+        <StatusCard label="Ohne Teamspace" value={missingCrmDays.length} detail="nicht zur Kenntnis genommen" tone={missingCrmDays.length > 0 ? "warn" : "ok"} />
         <StatusCard label="Status" value={stats?.closed ? "geschlossen" : canClose ? "bereit" : "offen"} detail={stats?.closed ? "Monat ist gesperrt" : canClose ? "kann abgeschlossen werden" : "Prüfpunkte bearbeiten"} tone={stats?.closed || canClose ? "ok" : "warn"} />
       </div>
 
@@ -260,14 +334,14 @@ export function MonthlyClosePage({ onNavigate }: MonthlyClosePageProps) {
           <CardTitle>Checkliste</CardTitle>
           <CardDescription>Bewertungen sind Pflicht. Teamspace-Punkte helfen beim sauberen CRM-Abgleich.</CardDescription>
         </CardHeader>
-        <CardContent className="grid gap-2 px-4 pb-4 md:grid-cols-3">
+        <CardContent className="grid gap-2 px-4 pb-4 md:grid-cols-2">
           {checklist.map((item) => (
             <div key={item.label} className="rounded-md border bg-background p-3">
               <div className="mb-2 flex items-center justify-between gap-2">
                 <span className="text-sm font-medium">{item.label}</span>
                 <Badge variant={item.count > 0 ? "warning" : "success"}>{item.count}</Badge>
               </div>
-              <p className="text-xs text-muted-foreground">{item.blocker ? "Muss erledigt sein." : "Vor Abschluss prüfen."}</p>
+              <p className="text-xs text-muted-foreground">{item.blocker ? "Muss erledigt sein." : item.detail}</p>
             </div>
           ))}
         </CardContent>
@@ -278,16 +352,16 @@ export function MonthlyClosePage({ onNavigate }: MonthlyClosePageProps) {
           <CardTitle>Aufräumen</CardTitle>
           <CardDescription>Alles, was für diesen Monat noch Aufmerksamkeit braucht.</CardDescription>
         </CardHeader>
-        <CardContent className="space-y-5 px-4 pb-4">
+        <CardContent className="grid gap-4 px-4 pb-4 xl:grid-cols-2">
           <section className="space-y-2">
             <div className="flex items-center gap-2 text-sm font-medium">
               <FileWarning className="size-4 text-muted-foreground" />
               Offene Bewertungen
             </div>
-            {openSessions.map((session) => (
-              <OpenSessionItem key={session.id} session={session} month={month} onNavigate={onNavigate} />
+            {openTicketGroups.map((group) => (
+              <OpenTicketItem key={group.ticketId} group={group} month={month} onNavigate={onNavigate} />
             ))}
-            {openSessions.length === 0 ? <p className="rounded-md border bg-muted/20 p-3 text-sm text-muted-foreground">Keine offenen Bewertungen.</p> : null}
+            {openTicketGroups.length === 0 ? <p className="rounded-md border bg-muted/20 p-3 text-sm text-muted-foreground">Keine offenen Bewertungen.</p> : null}
           </section>
 
           <section className="space-y-2">
@@ -296,21 +370,16 @@ export function MonthlyClosePage({ onNavigate }: MonthlyClosePageProps) {
               Tage ohne Teamspace-Wert
             </div>
             {missingCrmDays.map((item) => (
-              <CrmDayItem key={`${item.ticket_id}-${item.day}-missing`} item={item} onNavigate={onNavigate} />
+              <CrmDayItem
+                key={`${item.ticket_id}-${item.day}-missing`}
+                item={item}
+                acknowledging={acknowledgingKeys.has(`${item.ticket_id}:${item.day}`)}
+                onAcknowledge={acknowledgeMissingCrmDay}
+                onNavigate={onNavigate}
+              />
             ))}
             {missingCrmDays.length === 0 ? <p className="rounded-md border bg-muted/20 p-3 text-sm text-muted-foreground">Alle getrackten Tage haben einen Teamspace-Wert.</p> : null}
           </section>
-
-          <section className="space-y-2">
-            <div className="flex items-center gap-2 text-sm font-medium">
-              <TrendingUp className="size-4 text-muted-foreground" />
-              Teamspace-Differenzen
-            </div>
-            {crmMismatches.map((item) => (
-              <CrmDayItem key={`${item.ticket_id}-${item.day}-mismatch`} item={item} onNavigate={onNavigate} />
-            ))}
-            {crmMismatches.length === 0 ? <p className="rounded-md border bg-muted/20 p-3 text-sm text-muted-foreground">Keine Abweichungen zwischen Sessions und Teamspace.</p> : null}
-          </section>
         </CardContent>
       </Card>