diff --git a/server/memo.go b/server/memo.go
index 84b9747c..b41407d0 100644
--- a/server/memo.go
+++ b/server/memo.go
@@ -230,6 +230,9 @@ func (s *Server) registerMemoRoutes(g *echo.Group) {
 			ID: memoID,
 		}
 		if err := s.Store.DeleteMemo(ctx, memoDelete); err != nil {
+			if common.ErrorCode(err) == common.NotFound {
+				return echo.NewHTTPError(http.StatusNotFound, fmt.Sprintf("Memo ID not found: %d", memoID))
+			}
 			return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to delete memo ID: %v", memoID)).SetInternal(err)
 		}
 
diff --git a/server/resource.go b/server/resource.go
index 141efb32..e12f7e48 100644
--- a/server/resource.go
+++ b/server/resource.go
@@ -8,6 +8,7 @@ import (
 	"strconv"
 
 	"github.com/usememos/memos/api"
+	"github.com/usememos/memos/common"
 
 	"github.com/labstack/echo/v4"
 )
@@ -158,6 +159,9 @@ func (s *Server) registerResourceRoutes(g *echo.Group) {
 			CreatorID: userID,
 		}
 		if err := s.Store.DeleteResource(ctx, resourceDelete); err != nil {
+			if common.ErrorCode(err) == common.NotFound {
+				return echo.NewHTTPError(http.StatusNotFound, fmt.Sprintf("Resource ID not found: %d", resourceID))
+			}
 			return echo.NewHTTPError(http.StatusInternalServerError, "Failed to delete resource").SetInternal(err)
 		}
 
diff --git a/server/shortcut.go b/server/shortcut.go
index c966ff6e..36d9355c 100644
--- a/server/shortcut.go
+++ b/server/shortcut.go
@@ -7,6 +7,7 @@ import (
 	"strconv"
 
 	"github.com/usememos/memos/api"
+	"github.com/usememos/memos/common"
 
 	"github.com/labstack/echo/v4"
 )
@@ -123,6 +124,9 @@ func (s *Server) registerShortcutRoutes(g *echo.Group) {
 			ID: shortcutID,
 		}
 		if err := s.Store.DeleteShortcut(ctx, shortcutDelete); err != nil {
+			if common.ErrorCode(err) == common.NotFound {
+				return echo.NewHTTPError(http.StatusNotFound, fmt.Sprintf("Shortcut ID not found: %d", shortcutID))
+			}
 			return echo.NewHTTPError(http.StatusInternalServerError, "Failed to delete shortcut").SetInternal(err)
 		}
 
diff --git a/server/user.go b/server/user.go
index f5af7798..99c1de35 100644
--- a/server/user.go
+++ b/server/user.go
@@ -250,6 +250,9 @@ func (s *Server) registerUserRoutes(g *echo.Group) {
 			ID: userID,
 		}
 		if err := s.Store.DeleteUser(ctx, userDelete); err != nil {
+			if common.ErrorCode(err) == common.NotFound {
+				return echo.NewHTTPError(http.StatusNotFound, fmt.Sprintf("User ID not found: %d", userID))
+			}
 			return echo.NewHTTPError(http.StatusInternalServerError, "Failed to delete user").SetInternal(err)
 		}
 
diff --git a/store/memo.go b/store/memo.go
index 036bb5f2..b8cfcc49 100644
--- a/store/memo.go
+++ b/store/memo.go
@@ -348,7 +348,7 @@ func findMemoRawList(ctx context.Context, tx *sql.Tx, find *api.MemoFind) ([]*me
 }
 
 func deleteMemo(ctx context.Context, tx *sql.Tx, delete *api.MemoDelete) error {
-	_, err := tx.ExecContext(ctx, `
+	result, err := tx.ExecContext(ctx, `
 		PRAGMA foreign_keys = ON;
 		DELETE FROM memo WHERE id = ?
 	`, delete.ID)
@@ -356,5 +356,10 @@ func deleteMemo(ctx context.Context, tx *sql.Tx, delete *api.MemoDelete) error {
 		return FormatError(err)
 	}
 
+	rows, _ := result.RowsAffected()
+	if rows == 0 {
+		return &common.Error{Code: common.NotFound, Err: fmt.Errorf("memo ID not found: %d", delete.ID)}
+	}
+
 	return nil
 }
diff --git a/store/resource.go b/store/resource.go
index ce6b712a..2605bb17 100644
--- a/store/resource.go
+++ b/store/resource.go
@@ -235,7 +235,7 @@ func findResourceList(ctx context.Context, tx *sql.Tx, find *api.ResourceFind) (
 }
 
 func deleteResource(ctx context.Context, tx *sql.Tx, delete *api.ResourceDelete) error {
-	_, err := tx.ExecContext(ctx, `
+	result, err := tx.ExecContext(ctx, `
 		PRAGMA foreign_keys = ON;
 		DELETE FROM resource WHERE id = ? AND creator_id = ?
 	`, delete.ID, delete.CreatorID)
@@ -243,5 +243,10 @@ func deleteResource(ctx context.Context, tx *sql.Tx, delete *api.ResourceDelete)
 		return FormatError(err)
 	}
 
+	rows, _ := result.RowsAffected()
+	if rows == 0 {
+		return &common.Error{Code: common.NotFound, Err: fmt.Errorf("resource ID not found: %d", delete.ID)}
+	}
+
 	return nil
 }
diff --git a/store/shortcut.go b/store/shortcut.go
index 2aeb2d9d..0eab5c91 100644
--- a/store/shortcut.go
+++ b/store/shortcut.go
@@ -287,7 +287,7 @@ func findShortcutList(ctx context.Context, tx *sql.Tx, find *api.ShortcutFind) (
 }
 
 func deleteShortcut(ctx context.Context, tx *sql.Tx, delete *api.ShortcutDelete) error {
-	_, err := tx.ExecContext(ctx, `
+	result, err := tx.ExecContext(ctx, `
 		PRAGMA foreign_keys = ON;
 		DELETE FROM shortcut WHERE id = ?
 	`, delete.ID)
@@ -295,5 +295,10 @@ func deleteShortcut(ctx context.Context, tx *sql.Tx, delete *api.ShortcutDelete)
 		return FormatError(err)
 	}
 
+	rows, _ := result.RowsAffected()
+	if rows == 0 {
+		return &common.Error{Code: common.NotFound, Err: fmt.Errorf("shortcut ID not found: %d", delete.ID)}
+	}
+
 	return nil
 }
diff --git a/store/user.go b/store/user.go
index d2494d6b..e0ed79a8 100644
--- a/store/user.go
+++ b/store/user.go
@@ -336,12 +336,18 @@ func findUserList(ctx context.Context, tx *sql.Tx, find *api.UserFind) ([]*userR
 }
 
 func deleteUser(ctx context.Context, tx *sql.Tx, delete *api.UserDelete) error {
-	if _, err := tx.ExecContext(ctx, `
+	result, err := tx.ExecContext(ctx, `
 		PRAGMA foreign_keys = ON;
 		DELETE FROM user WHERE id = ?
-	`, delete.ID); err != nil {
+	`, delete.ID)
+	if err != nil {
 		return FormatError(err)
 	}
 
+	rows, _ := result.RowsAffected()
+	if rows == 0 {
+		return &common.Error{Code: common.NotFound, Err: fmt.Errorf("user ID not found: %d", delete.ID)}
+	}
+
 	return nil
 }