diff --git a/core/clients/platform.py b/core/clients/platform.py
index e226340..a6f5b7a 100644
--- a/core/clients/platform.py
+++ b/core/clients/platform.py
@@ -583,8 +583,10 @@ class LocalPlatformClient(ABC):
         if payment_details:
             form["account_info"] = payment_details_text
             form["msg"] = ad_text
-            form["min_amount"] = round(min_amount, 2)
-            form["max_amount"] = round(max_amount, 2)
+            if min_amount is not None:
+                form["min_amount"] = round(min_amount, 2)
+            if max_amount is not None:
+                form["max_amount"] = round(max_amount, 2)
 
         if edit:
             ad_response = await self.api.ad(ad_id=ad_id, **form)
diff --git a/core/lib/money.py b/core/lib/money.py
index 0011eb0..efb144e 100644
--- a/core/lib/money.py
+++ b/core/lib/money.py
@@ -138,7 +138,7 @@ class Money(object):
         rates = await self.get_rates_all()
         if currency not in rates and not currency == "USD":
             log.error(f"Can't create ad without rates: {currency}")
-            return
+            return (None, None)
         if currency == "USD":
             min_amount = min_usd
             max_amount = max_usd