diff --git a/examples/signatureTypes.ts b/examples/signatureTypes.ts
index 3f546b0..af3d79d 100644
--- a/examples/signatureTypes.ts
+++ b/examples/signatureTypes.ts
@@ -42,9 +42,21 @@ async function main() {
         gnosisSafeAddress,
     );
 
+    // Client used with a Polymarket Deposit Wallet: Signature type 3
+    const depositWalletAddress = "0x...";
+    const depositWalletClient = new ClobClient(
+        host,
+        chainId,
+        wallet,
+        creds,
+        SignatureType.POLY_DEPOSIT_WALLET,
+        depositWalletAddress,
+    );
+
     void clobClient;
     void polyProxyClient;
     void polyGnosisSafeClient;
+    void depositWalletClient;
 }
 
 main();
diff --git a/src/order-utils/model/signature-types.model.ts b/src/order-utils/model/signature-types.model.ts
index f5cab7b..cc536bb 100644
--- a/src/order-utils/model/signature-types.model.ts
+++ b/src/order-utils/model/signature-types.model.ts
@@ -13,4 +13,10 @@ export enum SignatureType {
      * EIP712 signatures signed by EOAs that own Polymarket Gnosis safes
      */
     POLY_GNOSIS_SAFE = 2,
+
+    /**
+     * EIP712 signatures signed by EOAs that own Polymarket Deposit Wallets.
+     * Validated on-chain via ERC-1271 isValidSignature() with ERC-7739 nested domain wrapping.
+     */
+    POLY_DEPOSIT_WALLET = 3,
 }