diff --git a/apps/web/pages/api/proofs/baseEthHolders/index.ts b/apps/web/pages/api/proofs/baseEthHolders/index.ts
index 70adb4d8da..9582037910 100644
--- a/apps/web/pages/api/proofs/baseEthHolders/index.ts
+++ b/apps/web/pages/api/proofs/baseEthHolders/index.ts
@@ -42,5 +42,5 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
   }
 
   // If error is not an instance of Error, return a generic error message
-  return res.status(409).json({ error: 'An unexpected error occurred' });
+  return res.status(500).json({ error: 'An unexpected error occurred' });
 }
diff --git a/apps/web/pages/api/proofs/bns/index.ts b/apps/web/pages/api/proofs/bns/index.ts
index 9dd260a5d2..bbf6698664 100644
--- a/apps/web/pages/api/proofs/bns/index.ts
+++ b/apps/web/pages/api/proofs/bns/index.ts
@@ -43,5 +43,5 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
   }
 
   // If error is not an instance of Error, return a generic error message
-  return res.status(409).json({ error: 'An unexpected error occurred' });
+  return res.status(500).json({ error: 'An unexpected error occurred' });
 }
diff --git a/apps/web/pages/api/proofs/cb1/index.ts b/apps/web/pages/api/proofs/cb1/index.ts
index ec1e4a3146..1919a4cf14 100644
--- a/apps/web/pages/api/proofs/cb1/index.ts
+++ b/apps/web/pages/api/proofs/cb1/index.ts
@@ -1,5 +1,5 @@
 import { trustedSignerPKey } from 'apps/web/src/constants';
-import { DiscountType, proofValidation } from 'apps/web/src/utils/proofs';
+import { DiscountType, ProofsException, proofValidation } from 'apps/web/src/utils/proofs';
 import { sybilResistantUsernameSigning } from 'apps/web/src/utils/proofs/sybil_resistance';
 import type { NextApiRequest, NextApiResponse } from 'next';
 
@@ -52,12 +52,12 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     );
     return res.status(200).json(result);
   } catch (error) {
-    console.error(error);
-    if (error instanceof Error) {
-      return res.status(409).json({ error: error.message });
+    if (error instanceof ProofsException) {
+      return res.status(error.statusCode).json({ error: error.message });
     }
-
-    // If error is not an instance of Error, return a generic error message
-    return res.status(409).json({ error: 'An unexpected error occurred' });
+    console.error(error);
   }
+
+  // If error is not an instance of Error, return a generic error message
+  return res.status(500).json({ error: 'An unexpected error occurred' });
 }
diff --git a/apps/web/pages/api/proofs/cbid/index.ts b/apps/web/pages/api/proofs/cbid/index.ts
index e0e0a13ae0..81e843ff4c 100644
--- a/apps/web/pages/api/proofs/cbid/index.ts
+++ b/apps/web/pages/api/proofs/cbid/index.ts
@@ -44,5 +44,5 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     console.error(error);
   }
   // If error is not an instance of Error, return a generic error message
-  return res.status(409).json({ error: 'An unexpected error occurred' });
+  return res.status(500).json({ error: 'An unexpected error occurred' });
 }
diff --git a/apps/web/pages/api/proofs/coinbase/index.ts b/apps/web/pages/api/proofs/coinbase/index.ts
index 5107e346d5..bd2d78b70d 100644
--- a/apps/web/pages/api/proofs/coinbase/index.ts
+++ b/apps/web/pages/api/proofs/coinbase/index.ts
@@ -1,5 +1,10 @@
 import { trustedSignerPKey } from 'apps/web/src/constants';
-import { DiscountType, proofValidation, VerifiedAccount } from 'apps/web/src/utils/proofs';
+import {
+  DiscountType,
+  ProofsException,
+  proofValidation,
+  VerifiedAccount,
+} from 'apps/web/src/utils/proofs';
 import { sybilResistantUsernameSigning } from 'apps/web/src/utils/proofs/sybil_resistance';
 import type { NextApiRequest, NextApiResponse } from 'next';
 import { Address } from 'viem';
@@ -54,11 +59,12 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     return res.status(200).json(result);
   } catch (error) {
     console.error(error);
-    if (error instanceof Error) {
-      return res.status(409).json({ error: error.message });
+    if (error instanceof ProofsException) {
+      return res.status(error.statusCode).json({ error: error.message });
     }
-
-    // If error is not an instance of Error, return a generic error message
-    return res.status(409).json({ error: 'An unexpected error occurred' });
+    console.error(error);
   }
+
+  // If error is not an instance of Error, return a generic error message
+  return res.status(500).json({ error: 'An unexpected error occurred' });
 }
diff --git a/apps/web/pages/api/proofs/earlyAccess/index.ts b/apps/web/pages/api/proofs/earlyAccess/index.ts
index aa1b7b797f..e4c2db7142 100644
--- a/apps/web/pages/api/proofs/earlyAccess/index.ts
+++ b/apps/web/pages/api/proofs/earlyAccess/index.ts
@@ -42,5 +42,5 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     console.error(error);
   }
   // If error is not an instance of Error, return a generic error message
-  return res.status(409).json({ error: 'An unexpected error occurred' });
+  return res.status(500).json({ error: 'An unexpected error occurred' });
 }
diff --git a/apps/web/src/utils/proofs/requests.ts b/apps/web/src/utils/proofs/requests.ts
index 1bf824528d..7c8e06bafa 100644
--- a/apps/web/src/utils/proofs/requests.ts
+++ b/apps/web/src/utils/proofs/requests.ts
@@ -49,7 +49,7 @@ export async function getWalletProofs(
   const hasPreviouslyRegistered = await hasRegisteredWithDiscount([address], chain);
   // if any linked address registered previously return an error
   if (hasPreviouslyRegistered) {
-    throw new ProofsException('This address has already claimed a username.', 400);
+    throw new ProofsException('This address has already claimed a username.', 409);
   }
   const [content] = await getProofsByNamespaceAndAddress(address, namespace, caseInsensitive);
   const proofs = content?.proofs ? (JSON.parse(content.proofs) as `0x${string}`[]) : [];
diff --git a/apps/web/src/utils/proofs/sybil_resistance.ts b/apps/web/src/utils/proofs/sybil_resistance.ts
index 87054f2181..53e8c97d3c 100644
--- a/apps/web/src/utils/proofs/sybil_resistance.ts
+++ b/apps/web/src/utils/proofs/sybil_resistance.ts
@@ -20,6 +20,7 @@ import {
   DiscountTypes,
   PreviousClaim,
   PreviousClaims,
+  ProofsException,
   VerifiedAccount,
 } from 'apps/web/src/utils/proofs/types';
 import { REGISTER_CONTRACT_ADDRESSES } from 'apps/web/src/utils/usernames';
@@ -122,7 +123,7 @@ export async function sybilResistantUsernameSigning(
   const discountValidatorAddress = discountTypes[chainId][discountType]?.discountValidatorAddress;
 
   if (!discountValidatorAddress || !isAddress(discountValidatorAddress)) {
-    throw new Error('Must provide a valid discountValidatorAddress');
+    throw new ProofsException('Must provide a valid discountValidatorAddress', 500);
   }
 
   const attestations = await getAttestations(
@@ -144,7 +145,7 @@ export async function sybilResistantUsernameSigning(
     const hasPreviouslyRegistered = await hasRegisteredWithDiscount(linkedAddresses, chainId);
     // if any linked address registered previously return an error
     if (hasPreviouslyRegistered) {
-      throw new Error('You have already claimed a discounted basename (onchain).');
+      throw new ProofsException('You have already claimed a discounted basename (onchain).', 409);
     }
 
     const kvKey = `${previousClaimsKVPrefix}${idemKey}`;
@@ -153,8 +154,9 @@ export async function sybilResistantUsernameSigning(
     const previousClaim = previousClaims[discountType];
     if (previousClaim) {
       if (previousClaim.address != address) {
-        throw new Error(
+        throw new ProofsException(
           'You tried claiming this with a different address, wait a couple minutes to try again.',
+          400,
         );
       }
       // return previously signed message
@@ -185,6 +187,9 @@ export async function sybilResistantUsernameSigning(
     };
   } catch (error) {
     console.error(error);
+    if (error instanceof Error) {
+      throw new ProofsException(error.message, 500);
+    }
     throw error;
   }
 }