diff --git a/css/main.css b/css/main.css
index b29cbe070..c3b5cbdaf 100644
--- a/css/main.css
+++ b/css/main.css
@@ -422,6 +422,14 @@ hr { margin: 2.25rem 0;}
   background: #C0392B;
 }
 
+.box-note {
+  text-align: center;
+  clear: both;
+  font-style: italic;
+  color: gray;
+  margin-bottom: 10px;
+}
+
 .box-signin {
   padding: 20px 40px;
   border: 1px solid #eee;
diff --git a/index.html b/index.html
index c369e0920..0a13cac95 100644
--- a/index.html
+++ b/index.html
@@ -189,7 +189,7 @@
             src="./img/satoshi.gif"
           />
           <div class="size-12 text-center text-gray" stype="margin-top:4px">
-          {{c.nick || 'NN'}}
+          {{c.nick}}
           </div>
         </div>
       </div>
@@ -455,6 +455,9 @@
               </div>
 
               <div class="tx-copayers">
+                <div class="box-note large-12" ng-show="tx.comment">
+                  "{{tx.comment}}" - {{$root.wallet.publicKeyRing.nicknameForCopayer(tx.creator)}}
+                </div>
 
                 <div class="box-copayers" ng-repeat="(cId, actions) in tx.peerActions">
                   <figure class="left">
@@ -664,6 +667,23 @@
                   </div>
                 </div>
               </div>
+
+              <div class="row">
+                <div class="large-12 medium-6 columns">
+                  <div class="row collapse">
+                    <label for="comment">Note
+                      <small ng-hide="!sendForm.comment.$pristine">optional</small>
+                      <small class="is-valid" ng-show="!sendForm.comment.$invalid && !sendForm.comment.$pristine">valid!</small>
+                      <small class="has-error" ng-show="sendForm.comment.$invalid && !sendForm.comment.$pristine">too long!</small>
+                    </label>
+                    <div class="small-12 columns">
+                      <textarea id="comment" ng-disabled="loading"
+                      name="comment" placeholder="Leave a private message to your copayers" ng-model="comment" ng-maxlength="100"></textarea>
+                    </div>
+                  </div>
+                </div>
+              </div>
+
               <div class="row">
                 <div class="large-5 columns">
                   <button type="submit" class="button secondary radius text-center" ng-disabled="sendForm.$invalid || loading" loading="Sending">
diff --git a/js/controllers/send.js b/js/controllers/send.js
index bfe939834..0e72e3e5e 100644
--- a/js/controllers/send.js
+++ b/js/controllers/send.js
@@ -47,19 +47,18 @@ angular.module('copayApp.controllers').controller('SendController',
 
       var address = form.address.$modelValue;
       var amount = (form.amount.$modelValue * 100000000).toFixed(); // satoshi to string
+      var comment = form.comment.$modelValue;
 
       var w = $rootScope.wallet;
-      w.createTx(address, amount,function() {
+      w.createTx(address, amount, comment, function() {
         $scope.loading = false;
         $rootScope.$flashMessage = { message: 'The transaction proposal has been created', type: 'success'};
         $rootScope.$digest();
       });
 
       // reset fields
-      $scope.address = null;
-      $scope.amount = null;
-      form.address.$pristine = true;
-      form.amount.$pristine = true;
+      $scope.address = $scope.amount = $scope.comment = null;
+      form.address.$pristine = form.amount.$pristine = form.comment.$pristine = true;
     };
 
     // QR code Scanner
diff --git a/js/models/core/PublicKeyRing.js b/js/models/core/PublicKeyRing.js
index f449158cc..4ba091a00 100644
--- a/js/models/core/PublicKeyRing.js
+++ b/js/models/core/PublicKeyRing.js
@@ -107,7 +107,7 @@ PublicKeyRing.prototype.nicknameForIndex = function(index) {
 };
 
 PublicKeyRing.prototype.nicknameForCopayer = function(copayerId) {
-  return this.nicknameFor[copayerId];
+  return this.nicknameFor[copayerId] || 'NN';
 };
 
 PublicKeyRing.prototype.addCopayer = function(newEpk, nickname) {
diff --git a/js/models/core/TxProposals.js b/js/models/core/TxProposals.js
index 10c2e1308..f25b2b9a7 100644
--- a/js/models/core/TxProposals.js
+++ b/js/models/core/TxProposals.js
@@ -20,6 +20,7 @@ function TxProposal(opts) {
   this.sentTs = opts.sentTs || null;
   this.sentTxid = opts.sentTxid || null;
   this.inputChainPaths = opts.inputChainPaths || [];
+  this.comment = opts.comment || null;
 }
 
 TxProposal.prototype.toObj = function() {
diff --git a/js/models/core/Wallet.js b/js/models/core/Wallet.js
index e6d45201c..29ea1e0a9 100644
--- a/js/models/core/Wallet.js
+++ b/js/models/core/Wallet.js
@@ -620,7 +620,7 @@ Wallet.prototype.getUnspent = function(cb) {
 };
 
 
-Wallet.prototype.createTx = function(toAddress, amountSatStr, opts, cb) {
+Wallet.prototype.createTx = function(toAddress, amountSatStr, comment, opts, cb) {
   var self = this;
   if (typeof opts === 'function') {
     cb = opts;
@@ -633,7 +633,7 @@ Wallet.prototype.createTx = function(toAddress, amountSatStr, opts, cb) {
   }
 
   this.getUnspent(function(err, safeUnspent) {
-    var ntxid = self.createTxSync(toAddress, amountSatStr, safeUnspent, opts);
+    var ntxid = self.createTxSync(toAddress, amountSatStr, comment, safeUnspent, opts);
     if (ntxid) {
       self.sendIndexes();
       self.sendTxProposals(null, ntxid);
@@ -644,7 +644,7 @@ Wallet.prototype.createTx = function(toAddress, amountSatStr, opts, cb) {
   });
 };
 
-Wallet.prototype.createTxSync = function(toAddress, amountSatStr, utxos, opts) {
+Wallet.prototype.createTxSync = function(toAddress, amountSatStr, comment, utxos, opts) {
   var pkr = this.publicKeyRing;
   var priv = this.privateKey;
   opts = opts || {};
@@ -655,6 +655,10 @@ Wallet.prototype.createTxSync = function(toAddress, amountSatStr, utxos, opts) {
     throw new Error('publicKeyRing is not complete');
   }
 
+  if (comment && comment.length > 100) {
+    throw new Error("comment can't be longer that 100 characters");
+  }
+
   if (!opts.remainderOut) {
     opts.remainderOut = {
       address: this._doGenerateAddress(true).toString()
@@ -695,6 +699,7 @@ Wallet.prototype.createTxSync = function(toAddress, amountSatStr, utxos, opts) {
     creator: myId,
     createdTs: now,
     builder: b,
+    comment: comment
   };
 
   var ntxid = this.txProposals.add(data);
diff --git a/test/test.Wallet.js b/test/test.Wallet.js
index 9a1663649..1d166ff3c 100644
--- a/test/test.Wallet.js
+++ b/test/test.Wallet.js
@@ -140,6 +140,7 @@ describe('Wallet model', function() {
     var ntxid = w.createTxSync(
       '15q6HKjWHAksHcH91JW23BJEuzZgFwydBt',
       '123456789',
+      null,
       unspentTest
     );
 
@@ -147,11 +148,54 @@ describe('Wallet model', function() {
     var txp = t.txps[ntxid];
     var tx = txp.builder.build();
     should.exist(tx);
+    chai.expect(txp.comment).to.be.null;
     tx.isComplete().should.equal(false);
     Object.keys(txp.seenBy).length.should.equal(1);
     Object.keys(txp.signedBy).length.should.equal(1);
   });
 
+  it('#create with comment', function() {
+
+    var w = createW2();
+    var comment = 'This is a comment';
+
+    unspentTest[0].address = w.publicKeyRing.getAddress(1, true).toString();
+    unspentTest[0].scriptPubKey = w.publicKeyRing.getScriptPubKeyHex(1, true);
+
+    var ntxid = w.createTxSync(
+      '15q6HKjWHAksHcH91JW23BJEuzZgFwydBt',
+      '123456789',
+      comment,
+      unspentTest
+    );
+
+    var t = w.txProposals;
+    var txp = t.txps[ntxid];
+    var tx = txp.builder.build();
+    should.exist(tx);
+    txp.comment.should.equal(comment);
+  });
+
+  it('#create throw exception on long comment', function() {
+
+    var w = createW2();
+    var comment = 'Lorem ipsum dolor sit amet, suas euismod vis te, velit deleniti vix an. Pri ex suscipit similique, inermis per';
+
+    unspentTest[0].address = w.publicKeyRing.getAddress(1, true).toString();
+    unspentTest[0].scriptPubKey = w.publicKeyRing.getScriptPubKeyHex(1, true);
+
+    var badCreate = function() {
+      w.createTxSync(
+        '15q6HKjWHAksHcH91JW23BJEuzZgFwydBt',
+        '123456789',
+        comment,
+        unspentTest
+      );
+    }
+
+    chai.expect(badCreate).to.throw(Error);
+  });
+
   it('#addressIsOwn', function() {
     var w = createW2();
     var l = w.getAddressesStr();
@@ -178,6 +222,7 @@ describe('Wallet model', function() {
         w.createTxSync(
           '15q6HKjWHAksHcH91JW23BJEuzZgFwydBt',
           '123456789',
+          null,
           unspentTest
         );
         var t = w.txProposals;
@@ -428,7 +473,7 @@ describe('Wallet model', function() {
     var w = createW2();
     var utxo = createUTXO(w);
     w.blockchain.fixUnspent(utxo);
-    w.createTx(toAddress, amountSatStr, function(ntxid) {
+    w.createTx(toAddress, amountSatStr, null, function(ntxid) {
       ntxid.length.should.equal(64);
       done();
     });
@@ -439,7 +484,7 @@ describe('Wallet model', function() {
     w.privateKey = null;
     var utxo = createUTXO(w);
     w.blockchain.fixUnspent(utxo);
-    w.createTx(toAddress, amountSatStr, function(ntxid) {
+    w.createTx(toAddress, amountSatStr, null, function(ntxid) {
       w.on('txProposalsUpdated', function() {
         w.getTxProposals()[0].signedByUs.should.equal(true);
         w.getTxProposals()[0].rejectedByUs.should.equal(false);
@@ -456,7 +501,7 @@ describe('Wallet model', function() {
     w.privateKey = null;
     var utxo = createUTXO(w);
     w.blockchain.fixUnspent(utxo);
-    w.createTx(toAddress, amountSatStr, function(ntxid) {
+    w.createTx(toAddress, amountSatStr, null, function(ntxid) {
       w.on('txProposalsUpdated', function() {
         w.getTxProposals()[0].signedByUs.should.equal(false);
         w.getTxProposals()[0].rejectedByUs.should.equal(true);
@@ -470,7 +515,7 @@ describe('Wallet model', function() {
     var w = createW2(null, 1);
     var utxo = createUTXO(w);
     w.blockchain.fixUnspent(utxo);
-    w.createTx(toAddress, amountSatStr, function(ntxid) {
+    w.createTx(toAddress, amountSatStr, null, function(ntxid) {
       w.sendTx(ntxid, function(txid) {
         txid.length.should.equal(64);
         done();
diff --git a/util/find_m_n.js b/util/find_m_n.js
index 88364fe6d..dd28ec828 100755
--- a/util/find_m_n.js
+++ b/util/find_m_n.js
@@ -80,7 +80,7 @@ for (var n = 1; n <= N_LIMIT; n++) {
         'amount': 10.0,
         'confirmations': 2
       }];
-      var ntxid = w.createTxSync(toAddress, amount, utxos);
+      var ntxid = w.createTxSync(toAddress, amount, null, utxos);
       var txp = w.txProposals.txps[ntxid];
 
       var signTx = function(pk, cb) {