diff --git a/lib/server.js b/lib/server.js
index d9d9e07..e4d8265 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -172,7 +172,7 @@ CopayServer.prototype.verifyMessageSignature = function (opts, cb) {
 	var self = this;
 
 	self.getWallet({ id: opts.walletId }, function (err, wallet) {
-		if (err || !wallet) return cb(err);
+		if (err) return cb(err);
 
 		var copayer = wallet.getCopayer(opts.copayerId);
 		if (!copayer) return cb('Copayer not found');
@@ -294,37 +294,69 @@ CopayServer.prototype._broadcastTx = function (rawTx, cb) {
 CopayServer.prototype.signTx = function (opts, cb) {
 	var self = this;
 
-	self.getWallet({ id: opts.walletId }, function (err, wallet) {
+	self.fetchTx(opts.walletId, opts.txProposalId, function (err, txp) {
 		if (err) return cb(err);
+		if (!txp) return cb('Transaction proposal not found');
+		var action = _.find(txp.actions, { copayerId: opts.copayerId });
+		if (action) return cb('Copayer already voted on this transaction proposal');
+		if (txp.status != 'pending') return cb('The transaction proposal is not pending');
 
-		self.fetchTx(wallet.id, opts.txProposalId, function (err, txp) {
-			if (err) return cb(err);
-			if (!txp) return cb('Transaction proposal not found');
-			var action = _.find(txp.actions, { copayerId: opts.copayerId });
-			if (action) return cb('Copayer already acted upon this transaction proposal');
-			if (txp.status != 'pending') return cb('The transaction proposal is not pending');
+		txp.sign(opts.copayerId, opts.signature);
 
-			txp.sign(opts.copayerId, opts.signature);
+		self.storage.storeTx(opts.walletId, txp, function (err) {
+			if (err) return cb(err);
 
-			self.storage.storeTx(wallet.id, txp, function (err) {
+			if (txp.status == 'accepted');
+			self._broadcastTx(txp.rawTx, function (err, txid) {
 				if (err) return cb(err);
 
-				if (txp.status == 'accepted');
-				self._broadcastTx(txp.rawTx, function (err, txid) {
+				tx.setBroadcasted(txid);
+				self.storage.storeTx(opts.walletId, txp, function (err) {
 					if (err) return cb(err);
 
-					tx.setBroadcasted(txid);
-					self.storage.storeTx(wallet.id, txp, function (err) {
-						if (err) return cb(err);
-
-						return cb();
-					});
+					return cb();
 				});
 			});
 		});
 	});
 }; 
 
+/**
+ * Reject a transaction proposal.
+ * @param {Object} opts
+ * @param {string} opts.walletId - The wallet id.
+ * @param {string} opts.copayerId - The wallet id.
+ * @param {string} opts.txProposalId - The identifier of the transaction.
+ */
+CopayServer.prototype.rejectTx = function (opts, cb) {
+	var self = this;
+
+	self.fetchTx(opts.walletId, opts.txProposalId, function (err, txp) {
+		if (err) return cb(err);
+		if (!txp) return cb('Transaction proposal not found');
+		var action = _.find(txp.actions, { copayerId: opts.copayerId });
+		if (action) return cb('Copayer already voted on this transaction proposal');
+		if (txp.status != 'pending') return cb('The transaction proposal is not pending');
+
+		txp.reject(opts.copayerId);
+
+		self.storage.storeTx(opts.walletId, txp, function (err) {
+			if (err) return cb(err);
+
+			if (txp.status == 'accepted');
+			self._broadcastTx(txp.rawTx, function (err, txid) {
+				if (err) return cb(err);
+
+				tx.setBroadcasted(txid);
+				self.storage.storeTx(opts.walletId, txp, function (err) {
+					if (err) return cb(err);
+
+					return cb();
+				});
+			});
+		});
+	});
+};
 
 /**
  * Retrieves all pending transaction proposals.
@@ -336,16 +368,12 @@ CopayServer.prototype.signTx = function (opts, cb) {
 CopayServer.prototype.getPendingTxs = function (opts, cb) {
 	var self = this;
 
-	self.getWallet({ id: opts.walletId }, function (err, wallet) {
+	self.storage.fetchTxs(opts.walletId, function (err, txps) {
 		if (err) return cb(err);
 
-		self.storage.fetchTxs(wallet.id, function (err, txps) {
-			if (err) return cb(err);
-
-			var pending = _.filter(txps, { status: 'pending' });
+		var pending = _.filter(txps, { status: 'pending' });
 
-			return cb(null, pending);
-		});
+		return cb(null, pending);
 	});
 };