diff --git a/js/models/core/AddressIndex.js b/js/models/core/AddressIndex.js
index bfc9b6464..484865b87 100644
--- a/js/models/core/AddressIndex.js
+++ b/js/models/core/AddressIndex.js
@@ -6,9 +6,22 @@ var Structure = require('./Structure');
 
 function AddressIndex(opts) {
   opts = opts || {};
-  this.cosigner = opts.cosigner || Structure.SHARED_INDEX;
+  this.cosigner = opts.cosigner
   this.changeIndex = opts.changeIndex || 0;
   this.receiveIndex = opts.receiveIndex || 0;
+
+  if (typeof this.cosigner === 'undefined') {
+    this.cosigner = Structure.SHARED_INDEX;
+  }
+}
+
+AddressIndex.init = function(totalCopayers) {
+  preconditions.shouldBeNumber(totalCopayers);
+  var indexes = [new AddressIndex()];
+  for (var i = 0 ; i < totalCopayers ; i++) {
+    indexes.push(new AddressIndex({cosigner: i}));
+  }
+  return indexes;
 }
 
 AddressIndex.fromList = function(indexes) {
diff --git a/js/models/core/PublicKeyRing.js b/js/models/core/PublicKeyRing.js
index f9e608afb..627706128 100644
--- a/js/models/core/PublicKeyRing.js
+++ b/js/models/core/PublicKeyRing.js
@@ -24,7 +24,8 @@ function PublicKeyRing(opts) {
 
   this.copayersHK = opts.copayersHK || [];
 
-  this.indexes = opts.indexes ? AddressIndex.fromList(opts.indexes) : [new AddressIndex()];
+  this.indexes = opts.indexes ? AddressIndex.fromList(opts.indexes)
+                              : AddressIndex.init(this.totalCopayers);
 
   this.publicKeysCache = opts.publicKeysCache || {};
   this.nicknameFor = opts.nicknameFor || {};
diff --git a/test/test.AddressIndex.js b/test/test.AddressIndex.js
index 767041529..3d87d9868 100644
--- a/test/test.AddressIndex.js
+++ b/test/test.AddressIndex.js
@@ -12,6 +12,7 @@ try {
 }
 var PublicKeyRing = copay.PublicKeyRing;
 var AddressIndex = copay.AddressIndex;
+var Structure = copay.Structure;
 
 
 var config = {
@@ -34,6 +35,18 @@ describe('AddressIndex model', function() {
     should.exist(i);
   });
 
+  it('should init indexes', function() {
+    var is = AddressIndex.init(2);
+    should.exist(is);
+    is.length.should.equal(3);
+
+    var cosigners = is.map(function(i) { return i.cosigner; });
+    cosigners.indexOf(Structure.SHARED_INDEX).should.not.equal(-1);
+    cosigners.indexOf(0).should.not.equal(-1);
+    cosigners.indexOf(1).should.not.equal(-1);
+    cosigners.indexOf(2).should.equal(-1);
+  });
+
   it('show be able to store and read', function() {
     var i = createAI();
     var changeN = 2;
diff --git a/test/test.PublicKeyRing.js b/test/test.PublicKeyRing.js
index c60aa8b01..0bb2523a5 100644
--- a/test/test.PublicKeyRing.js
+++ b/test/test.PublicKeyRing.js
@@ -383,6 +383,29 @@ describe('PublicKeyRing model', function() {
   });
 
 
+  it('#getIndex should return the right one', function() {
+    var config = {
+      networkName: 'livenet',
+    };
+    var p = new PublicKeyRing(config);
+    var i = p.getIndex(Structure.SHARED_INDEX);
+    should.exist(i);
+    i.cosigner.should.equal(Structure.SHARED_INDEX);
+    var shared = p.getSharedIndex();
+    shared.should.equal(i);
+  });
+
+  it('#getIndex should throw error', function() {
+    var config = {
+      networkName: 'livenet',
+    };
+    var p = new PublicKeyRing(config);
+
+    (function badCosigner() {
+      return p.getIndex(54);
+    }).should.throw();
+  });
+
   it('#getRedeemScriptMap check tests', function() {
     var k = createW();
     var w = k.w;