diff --git a/js/controllers/send.js b/js/controllers/send.js
index fd9338194..e4f378c1c 100644
--- a/js/controllers/send.js
+++ b/js/controllers/send.js
@@ -143,7 +143,7 @@ angular.module('copayApp.controllers').controller('SendController',
             if (merchantData.pr.ca) {
               message += ' This payment protocol transaction' + ' has been verified through ' + merchantData.pr.ca + '.';
             }
-            message += ' Message from server: ' + merchantData.ack.memo;
+            message += ' Message from server: ' + merchantData.pr.pd.memo;
             message += ' For merchant: ' + merchantData.pr.pd.payment_url;
           }
           notification.success('Success', message);
@@ -156,7 +156,7 @@ angular.module('copayApp.controllers').controller('SendController',
                 if (merchantData.pr.ca) {
                   message += ' This payment protocol transaction' + ' has been verified through ' + merchantData.pr.ca + '.';
                 }
-                message += ' Message from server: ' + merchantData.ack.memo;
+                message += ' Message from server: ' + merchantData.pr.pd.memo;
                 message += ' For merchant: ' + merchantData.pr.pd.payment_url;
               }
               notification.success('Transaction broadcasted', message);
@@ -464,6 +464,7 @@ angular.module('copayApp.controllers').controller('SendController',
       // whether we're in the Send scope or not.
       if (!scope.sendForm || !scope.sendForm.address) {
         delete $rootScope.merchant;
+        $rootScope.merchantError = false;
         if (callback) callback();
         return;
       }
@@ -547,9 +548,8 @@ angular.module('copayApp.controllers').controller('SendController',
 
         var balance = $rootScope.availableBalance;
         var available = +(balance * w.settings.unitToSatoshi).toFixed(0);
-
         if (merchantData && available < +merchantData.total) {
-          err = new Error('No unspent outputs available.');
+          err = new Error('Insufficient funds.');
           err.amount = merchantData.total;
         }
 
diff --git a/js/models/Wallet.js b/js/models/Wallet.js
index 8c63878f6..de618a830 100644
--- a/js/models/Wallet.js
+++ b/js/models/Wallet.js
@@ -1434,7 +1434,7 @@ Wallet.prototype.createPaymentTx = function(options, cb) {
       return self.receivePaymentRequest(options, pr, cb);
     })
     .error(function(data, status, headers, config) {
-      log.debug('Server was did not return PaymentRequest.');
+      log.debug('Server did not return PaymentRequest.');
       log.debug('XHR status: ' + status);
       if (options.fetch) {
         return cb(new Error('Status: ' + status));
@@ -1592,6 +1592,8 @@ Wallet.prototype.receivePaymentRequest = function(options, pr, cb) {
       self.sendIndexes();
       self.sendTxProposal(ntxid);
       self.emit('txProposalsUpdated');
+    } else {
+      return cb(new Error('Error creating the transaction'));
     }
 
     log.debug('You are currently on this BTC network:', network);
@@ -1867,9 +1869,15 @@ Wallet.prototype.createPaymentTxSync = function(options, merchantData, unspent)
 
   merchantData.total = merchantData.total.toString(10);
 
-  var b = new Builder(opts)
-    .setUnspent(unspent)
-    .setOutputs(outs);
+  var b;
+  try {
+    b = new Builder(opts)
+      .setUnspent(unspent)
+      .setOutputs(outs);
+  } catch (e) {
+    log.debug(e.message);
+    return;
+  };
 
   merchantData.pr.pd.outputs.forEach(function(output, i) {
     var script = {
@@ -2304,7 +2312,7 @@ Wallet.prototype.createTx = function(toAddress, amountSatStr, comment, opts, cb)
 
     var ntxid = self.createTxSync(toAddress, amountSatStr, comment, safeUnspent, opts);
     if (!ntxid) {
-      return cb(new Error('Error creating the Transaction'));
+      return cb(new Error('Error creating the transaction'));
     }
 
     self.sendIndexes();
diff --git a/views/send.html b/views/send.html
index 69236e72a..7707ce9dd 100644
--- a/views/send.html
+++ b/views/send.html
@@ -72,7 +72,7 @@
               </label>
               <div class="small-9 columns">
                 <input type="number" id="amount"
-                ng-disabled="loading || ($root.merchant && +$root.merchant.total > 0) || $root.merchantError"
+                ng-disabled="loading || ($root.merchant && +$root.merchant.total > 0)"
                 name="amount" placeholder="{{'Amount'|translate}}" ng-model="amount"
                 min="0.00000001" max="10000000000" valid-amount required
                 autocomplete="off">
@@ -95,7 +95,7 @@
               <label for="alternative"><span translate>Amount in</span> {{ alternativeName }} </label>
               <div class="small-9 columns">
                 <input type="number" id="alternative_amount"
-                ng-disabled="loading || !isRateAvailable || ($root.merchant && +$root.merchant.total > 0) || $root.merchantError"
+                ng-disabled="loading || !isRateAvailable || ($root.merchant && +$root.merchant.total > 0)"
                 name="alternative" placeholder="{{'Amount'|translate}}" ng-model="alternative"
                 required
                 autocomplete="off"