diff --git a/net/server/internal/api_clearCardNotes.go b/net/server/internal/api_clearCardNotes.go
new file mode 100644
index 00000000..be80e8f8
--- /dev/null
+++ b/net/server/internal/api_clearCardNotes.go
@@ -0,0 +1,61 @@
+package databag
+
+import (
+  "errors"
+  "net/http"
+  "gorm.io/gorm"
+  "github.com/gorilla/mux"
+  "databag/internal/store"
+)
+
+func ClearCardNotes(w http.ResponseWriter, r *http.Request) {
+
+  account, code, err := BearerAppToken(r, false);
+  if err != nil {
+    ErrResponse(w, code, err)
+    return
+  }
+
+  // scan parameters
+  params := mux.Vars(r)
+  cardId := params["cardId"]
+
+  // load referenced card
+  var slot store.CardSlot
+  if err := store.DB.Preload("Card.Groups").Where("account_id = ? AND card_slot_id = ?", account.ID, cardId).First(&slot).Error; err != nil {
+    if !errors.Is(err, gorm.ErrRecordNotFound) {
+      ErrResponse(w, http.StatusInternalServerError, err)
+    } else {
+      ErrResponse(w, http.StatusNotFound, err)
+    }
+    return
+  }
+  if slot.Card == nil {
+    ErrResponse(w, http.StatusNotFound, errors.New("card has been deleted"))
+    return
+  }
+
+  // save and update contact revision
+  err = store.DB.Transaction(func(tx *gorm.DB) error {
+    slot.Card.Notes = ""
+    slot.Card.DetailRevision += 1
+    if res := tx.Save(&slot.Card).Error; res != nil {
+      return res
+    }
+    if res := tx.Model(&slot).Update("revision", account.CardRevision + 1).Error; res != nil {
+      return res
+    }
+    if res := tx.Model(&account).Update("card_revision", account.CardRevision + 1).Error; res != nil {
+      return res
+    }
+    return nil
+  })
+  if err != nil {
+    ErrResponse(w, http.StatusInternalServerError, err)
+    return
+  }
+
+  SetStatus(account)
+  WriteResponse(w, getCardDetailModel(&slot));
+}
+
diff --git a/net/server/internal/api_contact.go b/net/server/internal/api_contact.go
index f935a8f4..06708f96 100644
--- a/net/server/internal/api_contact.go
+++ b/net/server/internal/api_contact.go
@@ -18,11 +18,6 @@ func ClearCardGroup(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusOK)
 }
 
-func ClearCardNotes(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
-	w.WriteHeader(http.StatusOK)
-}
-
 func GetCloseMessage(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
 	w.WriteHeader(http.StatusOK)
@@ -33,11 +28,6 @@ func RemoveCard(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusOK)
 }
 
-func SetCardNotes(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
-	w.WriteHeader(http.StatusOK)
-}
-
 func SetCloseMessage(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
 	w.WriteHeader(http.StatusOK)
diff --git a/net/server/internal/api_getCards.go b/net/server/internal/api_getCards.go
index 51e237ef..797a572c 100644
--- a/net/server/internal/api_getCards.go
+++ b/net/server/internal/api_getCards.go
@@ -16,7 +16,7 @@ func GetCards(w http.ResponseWriter, r *http.Request) {
     return
   }
 
-  card := r.FormValue("cardRevision")
+  card := r.FormValue("revision")
   if card != "" {
     cardRevisionSet = true
     if cardRevision, err = strconv.ParseInt(card, 10, 64); err != nil {
@@ -28,7 +28,7 @@ func GetCards(w http.ResponseWriter, r *http.Request) {
   var response []*Card
   if cardRevisionSet {
     var slots []store.CardSlot
-    if err := store.DB.Where("account_id = ? AND revision > ?", account.ID, cardRevision).Find(&slots).Error; err != nil {
+    if err := store.DB.Preload("Card").Where("account_id = ? AND revision > ?", account.ID, cardRevision).Find(&slots).Error; err != nil {
       ErrResponse(w, http.StatusInternalServerError, err)
       return
     }
diff --git a/net/server/internal/api_setCardNotes.go b/net/server/internal/api_setCardNotes.go
new file mode 100644
index 00000000..43b3b666
--- /dev/null
+++ b/net/server/internal/api_setCardNotes.go
@@ -0,0 +1,67 @@
+package databag
+
+import (
+  "errors"
+  "net/http"
+  "gorm.io/gorm"
+  "github.com/gorilla/mux"
+  "databag/internal/store"
+)
+
+func SetCardNotes(w http.ResponseWriter, r *http.Request) {
+
+  account, code, err := BearerAppToken(r, false);
+  if err != nil {
+    ErrResponse(w, code, err)
+    return
+  }
+
+  // scan parameters
+  params := mux.Vars(r)
+  cardId := params["cardId"]
+
+  var notes string
+  if err := ParseRequest(r, w, &notes); err != nil {
+    ErrResponse(w, http.StatusBadRequest, err)
+    return
+  }
+
+  // load referenced card
+  var slot store.CardSlot
+  if err := store.DB.Preload("Card.Groups").Where("account_id = ? AND card_slot_id = ?", account.ID, cardId).First(&slot).Error; err != nil {
+    if !errors.Is(err, gorm.ErrRecordNotFound) {
+      ErrResponse(w, http.StatusInternalServerError, err)
+    } else {
+      ErrResponse(w, http.StatusNotFound, err)
+    }
+    return
+  }
+  if slot.Card == nil {
+    ErrResponse(w, http.StatusNotFound, errors.New("card has been deleted"))
+    return
+  }
+
+  // save and update contact revision
+  err = store.DB.Transaction(func(tx *gorm.DB) error {
+    slot.Card.Notes = notes
+    slot.Card.DetailRevision += 1
+    if res := tx.Save(&slot.Card).Error; res != nil {
+      return res
+    }
+    if res := tx.Model(&slot).Update("revision", account.CardRevision + 1).Error; res != nil {
+      return res
+    }
+    if res := tx.Model(&account).Update("card_revision", account.CardRevision + 1).Error; res != nil {
+      return res
+    }
+    return nil
+  })
+  if err != nil {
+    ErrResponse(w, http.StatusInternalServerError, err)
+    return
+  }
+
+  SetStatus(account)
+  WriteResponse(w, getCardDetailModel(&slot));
+}
+
diff --git a/net/server/internal/ucContactSync_test.go b/net/server/internal/ucContactSync_test.go
index e628ced7..c0739f69 100644
--- a/net/server/internal/ucContactSync_test.go
+++ b/net/server/internal/ucContactSync_test.go
@@ -16,7 +16,11 @@ func TestContactSync(t *testing.T) {
   var data []byte
   var hdr map[string][]string
   var res error
-  var cards []Card
+  var cards *[]Card
+  var cardRevision string
+  var detailRevision int64
+  var detail CardDetail
+  var rev *Revision
 
   // setup testing group
   set, err := AddTestGroup("contactsync")
@@ -45,11 +49,36 @@ func TestContactSync(t *testing.T) {
   assert.Zero(t, bytes.Compare(img, data))
 
   // get full card list
+  cards = &[]Card{}
   assert.NoError(t, ApiTestMsg(GetCards, "GET", "/contact/cards",
-    nil, nil, APP_TOKENAPP, set.B.Token, &cards, &hdr))
+    nil, nil, APP_TOKENAPP, set.B.Token, cards, &hdr))
+  cardRevision = hdr["Card-Revision"][0]
+  cards = &[]Card{}
+  assert.NoError(t, ApiTestMsg(GetCards, "GET", "/contact/cards?revision=" + cardRevision,
+    nil, nil, APP_TOKENAPP, set.B.Token, cards, &hdr))
+  cardRevision = hdr["Card-Revision"][0]
+  assert.Equal(t, 0, len(*cards))
 
-  PrintMsg(set.B.A.CardId)
-  PrintMsg(hdr)
-  PrintMsg(cards)
+  // set card notes
+  GetTestRevision(set.B.Revisions)
+  assert.NoError(t, ApiTestMsg(SetCardNotes, "PUT", "/conact/cards/{cardId}/notes",
+    &param, "CardA notes", APP_TOKENAPP, set.B.Token, &detail, nil))
+  rev = GetTestRevision(set.B.Revisions)
+  cards = &[]Card{}
+  assert.NoError(t, ApiTestMsg(GetCards, "GET", "/contact/cards?revision=" + cardRevision,
+    nil, nil, APP_TOKENAPP, set.B.Token, cards, &hdr))
+  assert.Equal(t, 1, len(*cards))
+  detailRevision = (*cards)[0].Data.DetailRevision
+
+  // clear card notes
+  GetTestRevision(set.B.Revisions)
+  assert.NoError(t, ApiTestMsg(ClearCardNotes, "DELETE", "/conact/cards/{cardId}/notes",
+    &param, nil, APP_TOKENAPP, set.B.Token, &detail, nil))
+  assert.NotEqual(t, rev.Card, GetTestRevision(set.B.Revisions).Card)
+  cards = &[]Card{}
+  assert.NoError(t, ApiTestMsg(GetCards, "GET", "/contact/cards?revision=" + cardRevision,
+    nil, nil, APP_TOKENAPP, set.B.Token, cards, &hdr))
+  assert.Equal(t, 1, len(*cards))
+  assert.NotEqual(t, detailRevision, (*cards)[0].Data.DetailRevision)
 
 }