diff --git a/core/constraints/arbitrum.py b/core/constraints/arbitrum.py
index c9c1714..ea9c9f1 100644
--- a/core/constraints/arbitrum.py
+++ b/core/constraints/arbitrum.py
@@ -119,8 +119,8 @@ def is_observed(self, *args, **kwargs) -> bool:
         for user_address in self.user_addresses:
             try:
                 address = token_client.to_checksum_address(user_address)
-                delegated_address = token_client.get_delegates_address()
-                if (
+                delegated_address = token_client.get_delegates_address(user_address)
+                if not delegated_address or (
                     ConstraintParam.ADDRESS.name in self.param_keys()
                     and delegated_address.lower()
                     != self.param_values[ConstraintParam.ADDRESS.name].lower()
diff --git a/core/constraints/optimism.py b/core/constraints/optimism.py
index be182a0..7bf81fb 100644
--- a/core/constraints/optimism.py
+++ b/core/constraints/optimism.py
@@ -50,8 +50,8 @@ def is_observed(self, *args, **kwargs) -> bool:
         for user_address in self.user_addresses:
             try:
                 address = token_client.to_checksum_address(user_address)
-                delegated_address = token_client.get_delegates_address()
-                if (
+                delegated_address = token_client.get_delegates_address(user_address)
+                if not delegated_address or (
                     ConstraintParam.ADDRESS.name in self.param_keys()
                     and delegated_address.lower()
                     != self.param_values[ConstraintParam.ADDRESS.name].lower()