diff --git a/weboob/backends/bnporc/backend.py b/weboob/backends/bnporc/backend.py
index 98e9d051..299dfe31 100644
--- a/weboob/backends/bnporc/backend.py
+++ b/weboob/backends/bnporc/backend.py
@@ -65,17 +65,14 @@ class BNPorcBackend(BaseBackend, ICapBank):
             yield account
 
     def get_account(self, _id):
-        try:
-            _id = long(_id)
-        except ValueError:
+        if not _id.isdigit():
             raise AccountNotFound()
+        with self.browser:
+            account = self.browser.get_account(_id)
+        if account:
+            return account
         else:
-            with self.browser:
-                account = self.browser.get_account(_id)
-            if account:
-                return account
-            else:
-                raise AccountNotFound()
+            raise AccountNotFound()
 
     def iter_history(self, account):
         with self.browser:
@@ -92,10 +89,10 @@ class BNPorcBackend(BaseBackend, ICapBank):
             account = account.id
 
         try:
-            account = long(account)
-            to = long(to)
+            assert account.isdigit()
+            assert to.isdigit()
             amount = float(amount)
-        except ValueError:
+        except (AssertionError, ValueError):
             raise AccountNotFound()
 
         with self.browser:
diff --git a/weboob/backends/bnporc/browser.py b/weboob/backends/bnporc/browser.py
index e353d258..312aa796 100644
--- a/weboob/backends/bnporc/browser.py
+++ b/weboob/backends/bnporc/browser.py
@@ -104,14 +104,14 @@ class BNPorc(BaseBrowser):
         return self.page.get_list()
 
     def get_account(self, id):
-        assert isinstance(id, (int, long))
+        assert isinstance(id, (str, unicode))
 
         if not self.is_on_page(pages.AccountsList):
             self.location('/NSFR?Action=DSP_VGLOBALE')
 
         l = self.page.get_list()
         for a in l:
-            if long(a.id) == id:
+            if a.id == id:
                 return a
 
         return None
diff --git a/weboob/backends/bnporc/pages/transfer.py b/weboob/backends/bnporc/pages/transfer.py
index d4425794..782d9d1f 100644
--- a/weboob/backends/bnporc/pages/transfer.py
+++ b/weboob/backends/bnporc/pages/transfer.py
@@ -33,7 +33,7 @@ class TransferPage(BasePage):
             if table.attrib.get('cellspacing') == '2':
                 for tr in table.cssselect('tr.hdoc1, tr.hdotc1'):
                     tds = tr.findall('td')
-                    id = long(tds[1].text.replace(u'\xa0', u''))
+                    id = tds[1].text.replace(u'\xa0', u'')
                     if id == from_id:
                         if tds[4].find('input') is None:
                             raise TransferError("Unable to make a transfer from %s" % from_id)
diff --git a/weboob/backends/cragr/backend.py b/weboob/backends/cragr/backend.py
index ffce70ef..73273027 100644
--- a/weboob/backends/cragr/backend.py
+++ b/weboob/backends/cragr/backend.py
@@ -46,16 +46,13 @@ class CragrBackend(BaseBackend, ICapBank):
             yield account
 
     def get_account(self, _id):
-        try:
-            _id = long(_id)
-        except ValueError:
+        if not _id.isdigit():
             raise AccountNotFound()
+        account = self.browser.get_account(_id)
+        if account:
+            return account
         else:
-            account = self.browser.get_account(_id)
-            if account:
-                return account
-            else:
-                raise AccountNotFound()
+            raise AccountNotFound()
 
     def iter_operations(self, account):
         """ TODO Not supported yet """
diff --git a/weboob/backends/cragr/browser.py b/weboob/backends/cragr/browser.py
index 98cbf556..44cce587 100644
--- a/weboob/backends/cragr/browser.py
+++ b/weboob/backends/cragr/browser.py
@@ -70,7 +70,7 @@ class Cragr(BaseBrowser):
         return self.page.get_list()
 
     def get_account(self, id):
-        assert isinstance(id, (int, long))
+        assert isinstance(id, (str, unicode))
 
         l = self.get_accounts_list()
         for a in l:
diff --git a/weboob/backends/lcl/backend.py b/weboob/backends/lcl/backend.py
index 050dc605..64f09c62 100644
--- a/weboob/backends/lcl/backend.py
+++ b/weboob/backends/lcl/backend.py
@@ -46,16 +46,13 @@ class LCLBackend(BaseBackend, ICapBank):
             yield account
 
     def get_account(self, _id):
-        try:
-            _id = long(_id)
-        except ValueError:
+        if not _id.isdigit():
             raise AccountNotFound()
+        account = self.browser.get_account(_id)
+        if account:
+            return account
         else:
-            account = self.browser.get_account(_id)
-            if account:
-                return account
-            else:
-                raise AccountNotFound()
+            raise AccountNotFound()
 
     def iter_operations(self, account):
         """ TODO Not supported yet """
diff --git a/weboob/backends/lcl/browser.py b/weboob/backends/lcl/browser.py
index 9f0971b8..073c6147 100644
--- a/weboob/backends/lcl/browser.py
+++ b/weboob/backends/lcl/browser.py
@@ -61,7 +61,7 @@ class LCLBrowser(BaseBrowser):
         return self.page.get_list()
 
     def get_account(self, id):
-        assert isinstance(id, (int, long))
+        assert isinstance(id, (str, unicode))
 
         l = self.get_accounts_list()
         for a in l: