diff --git a/src/components/manifest/ManifestFormLine.jsx b/src/components/manifest/ManifestFormLine.jsx
index 8b59624..3828b57 100644
--- a/src/components/manifest/ManifestFormLine.jsx
+++ b/src/components/manifest/ManifestFormLine.jsx
@@ -30,8 +30,15 @@ import { articleSupplierAutomat } from '../../automats/articleDetailAutomat';
 import { selectCompanyTaxrate } from '../../automats/companyAutomat';
 import {
   BORDER,
+  GREEN,
+  alpha,
 } from '../../colors';
 
+const LOCKED_ROW_BG = alpha(GREEN, 0.08);
+const LOCKED_ROW_HOVER_BG = alpha(GREEN, 0.12);
+const LOCKED_CELL_BORDER = alpha(GREEN, 0.32);
+const LOCKED_CELL_BG = alpha(GREEN, 0.08);
+
 class ManifestFormLine extends PureComponent {
   constructor(props) {
     super(props);
@@ -60,6 +67,16 @@ class ManifestFormLine extends PureComponent {
     return props.line?.sku ? String(props.line.sku).trim() : null;
   }
 
+  isFullyLedgered(props = this.props) {
+    const { ledgerLine, line } = props;
+    return Boolean(
+      ledgerLine?.isBooked ||
+      (ledgerLine && ledgerLine.targetAmount > 0 && ledgerLine.remainingAmount <= 0) ||
+      line?.isBooked ||
+      line?.is_booked
+    );
+  }
+
   componentDidMount() {
     this.subscribeArticle(this.getArticleSku());
   }
@@ -125,7 +142,7 @@ class ManifestFormLine extends PureComponent {
   }
 
   handleRemove() {
-    if (this.props.isOnShipment) return;
+    if (this.props.isOnShipment || this.isFullyLedgered()) return;
     this.props.onRemove(this.props.line.key);
   }
 
@@ -139,7 +156,8 @@ class ManifestFormLine extends PureComponent {
 
   handleStartEdit(columnId) {
     const { saving } = this.props;
-    const isDisabled = saving || (columnId === 'sku' && Boolean(this.props.isOnShipment));
+    const isFullyLedgered = this.isFullyLedgered();
+    const isDisabled = saving || isFullyLedgered || (columnId === 'sku' && Boolean(this.props.isOnShipment));
     if (isDisabled) return;
     if (this.state.editingField !== columnId) {
       this.setState({ editingField: columnId });
@@ -162,6 +180,7 @@ class ManifestFormLine extends PureComponent {
   }
 
   handleCreateArticle() {
+    if (this.isFullyLedgered()) return;
     const { line, onCreateArticle } = this.props;
     if (onCreateArticle) {
       onCreateArticle(line);
@@ -169,6 +188,7 @@ class ManifestFormLine extends PureComponent {
   }
 
   handleSearchArticle() {
+    if (this.isFullyLedgered()) return;
     const { line, onSearchArticle } = this.props;
     if (onSearchArticle) {
       onSearchArticle(line);
@@ -176,107 +196,14 @@ class ManifestFormLine extends PureComponent {
   }
 
   handleRemoveSupplierArticle() {
+    if (this.isFullyLedgered()) return;
     const { line, supplierArticle, onRemoveSupplierArticle } = this.props;
     if (onRemoveSupplierArticle) {
       onRemoveSupplierArticle(line, supplierArticle);
     }
   }
 
-  renderLedgerChip() {
-    const { ledgerLine, onBookLine } = this.props;
-    if (!ledgerLine) return null;
-    const isBooked = ledgerLine.isBooked;
-    const isPartial = !isBooked && ledgerLine.bookedAmount > 0;
-    const isClickable = Boolean(onBookLine);
-    const isTracked = Boolean(ledgerLine.trackStock);
 
-    const tooltipTitle = isTracked
-      ? isBooked
-        ? `Vollständig im Lager gebucht: ${ledgerLine.bookedAmount} Stück (Klicken für Details)`
-        : isPartial
-          ? `Teilweise im Lager gebucht: ${ledgerLine.bookedAmount} von ${ledgerLine.targetAmount} Stück (Klicken zum Einbuchen dieser Position)`
-          : `Noch nicht im Lager gebucht (${ledgerLine.targetAmount} Stück – Klicken zum Einbuchen dieser Position)`
-      : isBooked
-        ? `Vollständig im Ledger verbucht: ${ledgerLine.bookedAmount} Stück (Klicken für Details)`
-        : isPartial
-          ? `Teilweise im Ledger verbucht: ${ledgerLine.bookedAmount} von ${ledgerLine.targetAmount} Stück (Klicken zum Verbuchen dieser Position)`
-          : `Noch nicht im Ledger verbucht (${ledgerLine.targetAmount} Stück – Klicken zum Verbuchen dieser Position)`;
-
-    const label = isTracked
-      ? isBooked
-        ? `Lager: ${ledgerLine.bookedAmount} Stk. gebucht`
-        : isPartial
-          ? `Lager: ${ledgerLine.bookedAmount}/${ledgerLine.targetAmount} Stk.`
-          : 'Lager: offen'
-      : isBooked
-        ? `Gebucht: ${ledgerLine.bookedAmount} Stk.`
-        : isPartial
-          ? `Gebucht: ${ledgerLine.bookedAmount}/${ledgerLine.targetAmount} Stk.`
-          : null;
-
-    if (!label) return null;
-
-    return (
-      <Tooltip title={tooltipTitle}>
-        <Chip
-          size="small"
-          clickable={isClickable}
-          onClick={
-            isClickable
-              ? (e) => {
-                e.stopPropagation();
-                onBookLine(ledgerLine);
-              }
-              : undefined
-          }
-          icon={
-            isBooked ? (
-              <CheckCircleOutlineOutlinedIcon sx={{ '&&': { fontSize: 13, color: 'inherit' } }} />
-            ) : (
-              <Inventory2OutlinedIcon sx={{ '&&': { fontSize: 13, color: 'inherit' } }} />
-            )
-          }
-          label={label}
-          variant={isBooked ? 'outlined' : 'filled'}
-          sx={{
-            height: 22,
-            fontSize: '0.7rem',
-            fontWeight: 700,
-            cursor: isClickable ? 'pointer' : 'default',
-            ...(isBooked
-              ? {
-                bgcolor: 'rgba(21, 128, 61, 0.08)',
-                color: '#15803d',
-                borderColor: '#15803d',
-                borderWidth: 1,
-                borderStyle: 'solid',
-                '&:hover': isClickable ? { bgcolor: 'rgba(21, 128, 61, 0.16)' } : undefined,
-              }
-              : isPartial
-                ? {
-                  bgcolor: '#d97706',
-                  color: '#ffffff',
-                  border: 'none',
-                  '&:hover': isClickable ? { bgcolor: '#b45309' } : undefined,
-                }
-                : {
-                  bgcolor: 'primary.main',
-                  color: '#ffffff',
-                  border: 'none',
-                  '&:hover': isClickable ? { bgcolor: 'primary.dark' } : undefined,
-                }),
-            '& .MuiChip-label': {
-              color: 'inherit',
-              px: 0.75,
-            },
-            '& .MuiChip-icon': {
-              color: 'inherit',
-            },
-          }}
-        />
-      </Tooltip>
-    );
-  }
 
   renderField(column, colIdx, totalCols) {
     const { id, align, type } = column;
@@ -365,10 +292,13 @@ class ManifestFormLine extends PureComponent {
     );
 
     const isEditing = this.state.editingField === id;
-    const isDisabled = saving || (id === 'sku' && Boolean(this.props.isOnShipment));
-    const titleText = id === 'sku' && this.props.isOnShipment
-      ? 'Artikel ist bereits auf einem Lieferschein und kann nicht geändert werden'
-      : undefined;
+    const isFullyLedgered = this.isFullyLedgered();
+    const isDisabled = saving || isFullyLedgered || (id === 'sku' && Boolean(this.props.isOnShipment));
+    const titleText = isFullyLedgered
+      ? 'Position ist bereits vollständig im Ledger verbucht und kann nicht geändert werden'
+      : id === 'sku' && this.props.isOnShipment
+        ? 'Artikel ist bereits auf einem Lieferschein und kann nicht geändert werden'
+        : undefined;
 
     if (isEditing) {
       return (
@@ -456,9 +386,10 @@ class ManifestFormLine extends PureComponent {
       <Box
         tabIndex={isDisabled ? -1 : 0}
         role={isDisabled ? undefined : 'button'}
-        onClick={() => this.handleStartEdit(id)}
-        onFocus={() => this.handleStartEdit(id)}
+        onClick={isDisabled ? undefined : () => this.handleStartEdit(id)}
+        onFocus={isDisabled ? undefined : () => this.handleStartEdit(id)}
         onKeyDown={(e) => {
+          if (isDisabled) return;
           if (e.key === 'Enter' || e.key === ' ') {
             e.preventDefault();
             this.handleStartEdit(id);
@@ -485,11 +416,16 @@ class ManifestFormLine extends PureComponent {
             ? 'warning.main'
             : isError
               ? 'error.main'
-              : 'rgba(0, 0, 0, 0.23)',
+              : isFullyLedgered
+                ? LOCKED_CELL_BORDER
+                : 'rgba(0, 0, 0, 0.23)',
           cursor: isDisabled ? 'default' : 'text',
           touchAction: 'manipulation',
           userSelect: 'none',
           zIndex: 1,
+          ...(isFullyLedgered && !isFieldDirty && !isError && {
+            bgcolor: LOCKED_CELL_BG,
+          }),
           ...(isFieldDirty && {
             bgcolor: 'rgba(237, 108, 2, 0.08)',
             zIndex: 2,
@@ -943,13 +879,19 @@ class ManifestFormLine extends PureComponent {
         >
           {/* Unlink button at the front */}
           {this.props.onRemoveSupplierArticle && supplierArticle.id != null && (
-            <Tooltip title="Lieferanten-Verknüpfung aufheben">
+            <Tooltip
+              title={
+                this.isFullyLedgered()
+                  ? 'Position ist bereits vollständig im Ledger verbucht und Verknüpfung kann nicht aufgehoben werden'
+                  : 'Lieferanten-Verknüpfung aufheben'
+              }
+            >
               <span>
                 <IconButton
                   size="small"
                   color="error"
                   aria-label="Lieferanten-Verknüpfung entfernen"
-                  disabled={this.props.saving || this.props.supplierArticleBusy}
+                  disabled={this.props.saving || this.props.supplierArticleBusy || this.isFullyLedgered()}
                   onClick={this.handleRemoveSupplierArticle}
                   sx={{ p: 0.25, mr: -0.25 }}
                 >
@@ -1095,8 +1037,6 @@ class ManifestFormLine extends PureComponent {
               )}
             </Box>
           )}
-
-          {this.renderLedgerChip()}
         </Box>
       );
     }
@@ -1109,6 +1049,7 @@ class ManifestFormLine extends PureComponent {
               size="small"
               variant="text"
               startIcon={<AddIcon sx={{ fontSize: 14 }} />}
+              disabled={this.isFullyLedgered()}
               onClick={this.handleCreateArticle}
               sx={{
                 fontSize: '0.7rem',
@@ -1131,6 +1072,7 @@ class ManifestFormLine extends PureComponent {
               size="small"
               variant="text"
               startIcon={<SearchIcon sx={{ fontSize: 14 }} />}
+              disabled={this.isFullyLedgered()}
               onClick={this.handleSearchArticle}
               sx={{
                 fontSize: '0.7rem',
@@ -1154,17 +1096,6 @@ class ManifestFormLine extends PureComponent {
               ? `Kein Lieferanten-Artikel für SKU „${rawSku}“ gefunden.`
               : `Kein Artikel für SKU „${rawSku}“ gefunden.`}
           </Typography>
-          {this.renderLedgerChip()}
-        </Box>
-      );
-    }
-
-    if (this.props.ledgerLine) {
-      const chip = this.renderLedgerChip();
-      if (!chip) return null;
-      return (
-        <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.75, py: 0.25 }}>
-          {chip}
         </Box>
       );
     }
@@ -1174,12 +1105,24 @@ class ManifestFormLine extends PureComponent {
 
   render() {
     const { columns = LINE_COLUMNS, saving, ledgerLine } = this.props;
+    const isFullyLedgered = this.isFullyLedgered();
     const secondLine = this.renderSecondLine();
 
     return (
       <Fragment>
         {/* Row 1: Editable Line Inputs */}
-        <TableRow hover sx={{ '& > td': { borderBottom: 'none', p: 0 } }}>
+        <TableRow
+          hover
+          sx={{
+            '& > td': { borderBottom: 'none', p: 0 },
+            ...(isFullyLedgered && {
+              bgcolor: LOCKED_ROW_BG,
+              '&:hover': {
+                bgcolor: LOCKED_ROW_HOVER_BG,
+              },
+            }),
+          }}
+        >
           {columns.map((col, colIdx) => (
             <TableCell
               key={col.id}
@@ -1206,6 +1149,9 @@ class ManifestFormLine extends PureComponent {
               verticalAlign: 'middle',
               width: (this.props.onMove ? 80 : 36) + (this.props.kind === 'delivery' && Boolean(this.props.onBookLine) ? 36 : 0),
               whiteSpace: 'nowrap',
+              ...(isFullyLedgered && {
+                bgcolor: LOCKED_ROW_BG,
+              }),
             }}
           >
             <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.25 }}>
@@ -1269,9 +1215,15 @@ class ManifestFormLine extends PureComponent {
               <IconButton
                 size="small"
                 aria-label="Zeile entfernen"
-                disabled={saving || Boolean(this.props.isOnShipment)}
+                disabled={saving || Boolean(this.props.isOnShipment) || isFullyLedgered}
                 onClick={this.handleRemove}
-                title={this.props.isOnShipment ? 'Artikel ist bereits auf einem Lieferschein und kann nicht entfernt werden' : 'Zeile entfernen'}
+                title={
+                  isFullyLedgered
+                    ? 'Position ist bereits vollständig im Ledger verbucht und kann nicht entfernt werden'
+                    : this.props.isOnShipment
+                      ? 'Artikel ist bereits auf einem Lieferschein und kann nicht entfernt werden'
+                      : 'Zeile entfernen'
+                }
                 sx={{ p: 0.35 }}
               >
                 <DeleteOutlinedIcon sx={{ fontSize: 18 }} />
@@ -1282,7 +1234,14 @@ class ManifestFormLine extends PureComponent {
 
         {/* Row 2: Matched Supplier Article Details */}
         {secondLine && (
-          <TableRow sx={{ '& > td': { pt: 0.25, pb: 0.75, borderBottom: 'none' } }}>
+          <TableRow
+            sx={{
+              '& > td': { pt: 0.25, pb: 0.75, borderBottom: 'none' },
+              ...(isFullyLedgered && {
+                bgcolor: LOCKED_ROW_BG,
+              }),
+            }}
+          >
             <TableCell
               colSpan={columns.length + 1}
               sx={{
diff --git a/src/components/manifest/ManifestLines.jsx b/src/components/manifest/ManifestLines.jsx
index f1fbf97..a53d664 100644
--- a/src/components/manifest/ManifestLines.jsx
+++ b/src/components/manifest/ManifestLines.jsx
@@ -200,13 +200,29 @@ class ManifestLines extends PureComponent {
             })()}
             {(() => {
               const hasShippedLines = kind === 'order' && Array.isArray(shipments) && shipments.some((sh) => (sh.lines?.length || 0) > 0);
+              const hasLedgeredLines = kind === 'delivery' && Array.isArray(lines) && lines.some((line) => {
+                const ledgerLine = line?.id != null ? ledgerLinesById?.[line.id] : null;
+                return Boolean(
+                  ledgerLine?.isBooked ||
+                  (ledgerLine && ledgerLine.targetAmount > 0 && ledgerLine.remainingAmount <= 0) ||
+                  (ledgerLine && ledgerLine.bookedAmount > 0) ||
+                  line?.isBooked ||
+                  line?.is_booked
+                );
+              });
+              const disabled = saving || !lines || lines.length === 0 || hasShippedLines || hasLedgeredLines;
+              const title = hasLedgeredLines
+                ? 'Lieferung enthält bereits im Ledger verbuchte Positionen'
+                : hasShippedLines
+                  ? 'Auftrag enthält bereits ausgelieferte Positionen'
+                  : 'Alle Zeilen entfernen';
               return (
                 <Button
                   size="small"
                   startIcon={<DeleteSweepOutlinedIcon />}
-                  disabled={saving || !lines || lines.length === 0 || hasShippedLines}
+                  disabled={disabled}
                   onClick={onRemoveAllLines}
-                  title={hasShippedLines ? 'Auftrag enthält bereits ausgelieferte Positionen' : 'Alle Zeilen entfernen'}
+                  title={title}
                 >
                   Alle Zeilen entfernen
                 </Button>