diff --git a/src/api/account.ts b/src/api/account.ts
index 5e0ff34c5..24b75e5e2 100644
--- a/src/api/account.ts
+++ b/src/api/account.ts
@@ -918,7 +918,7 @@ export class Account {
    */
   async verifySecp256k1Account(args: {
     message: HexInput;
-    signature: HexInput | Secp256k1Signature | AnySignature;
+    signature: Secp256k1Signature | AnySignature;
     recoveryBit?: number;
     accountAddress: AccountAddressInput;
   }): Promise<AnyPublicKey> {
diff --git a/src/core/crypto/singleKey.ts b/src/core/crypto/singleKey.ts
index c3b848c82..b66fd43ed 100644
--- a/src/core/crypto/singleKey.ts
+++ b/src/core/crypto/singleKey.ts
@@ -190,6 +190,27 @@ export class AnyPublicKey extends AccountPublicKey {
   static isInstance(publicKey: PublicKey): publicKey is AnyPublicKey {
     return "publicKey" in publicKey && "variant" in publicKey;
   }
+
+  /**
+   * Recover a Secp256k1 AnyPublicKey from a signature and message.
+   *
+   * @param args.signature - The signature to recover the public key from.
+   * @param args.message - The message that was signed.
+   * @param args.recoveryBit - The recovery bit to use for the public key.
+   */
+  static fromSecp256k1SignatureAndMessage(args: {
+    signature: AnySignature;
+    message: HexInput;
+    recoveryBit: number;
+  }): AnyPublicKey {
+    const { signature, message, recoveryBit } = args;
+    const publicKey = Secp256k1PublicKey.fromSignatureAndMessage({
+      signature: toSecp256k1Signature(signature),
+      message,
+      recoveryBit,
+    });
+    return new AnyPublicKey(publicKey);
+  }
 }
 
 /**
@@ -276,26 +297,4 @@ export class AnySignature extends Signature {
       "toUint8Array" in signature.signature
     );
   }
-
-  /**
-   * Recover a Secp256k1 public key from a signature and message.
-   *
-   * @param args - The arguments for recovering the public key.
-   * @param args.signature - The signature to recover the public key from.
-   * @param args.message - The message that was signed.
-   * @param args.recoveryBit - The recovery bit to use for the public key.
-   */
-  static fromSecp256k1SignatureAndMessage(args: {
-    signature: AnySignature;
-    message: HexInput;
-    recoveryBit: number;
-  }): AnyPublicKey {
-    const { signature, message, recoveryBit } = args;
-    const publicKey = Secp256k1PublicKey.fromSignatureAndMessage({
-      signature: toSecp256k1Signature(signature),
-      message,
-      recoveryBit,
-    });
-    return new AnyPublicKey(publicKey);
-  }
 }
diff --git a/src/internal/account.ts b/src/internal/account.ts
index 4dba85717..5faf559d5 100644
--- a/src/internal/account.ts
+++ b/src/internal/account.ts
@@ -29,14 +29,7 @@ import {
 } from "../types";
 import { AccountAddress, AccountAddressInput } from "../core/accountAddress";
 import { Account } from "../account";
-import {
-  AnyPublicKey,
-  AnySignature,
-  Ed25519PublicKey,
-  PrivateKey,
-  Secp256k1PublicKey,
-  Secp256k1Signature,
-} from "../core/crypto";
+import { AnyPublicKey, AnySignature, Ed25519PublicKey, PrivateKey, Secp256k1Signature } from "../core/crypto";
 import { queryIndexer } from "./general";
 import {
   GetAccountCoinsCountQuery,
@@ -64,7 +57,6 @@ import { CurrentFungibleAssetBalancesBoolExp } from "../types/generated/types";
 import { getTableItem } from "./table";
 import { APTOS_COIN } from "../utils";
 import { AptosApiError } from "../errors";
-import { toSecp256k1Signature } from "../core/crypto/signatureUtils";
 
 /**
  * Retrieves account information for a specified account address.
@@ -840,12 +832,13 @@ export async function isAccountExist(args: { aptosConfig: AptosConfig; authKey:
 export async function verifySecp256k1Account(args: {
   aptosConfig: AptosConfig;
   message: HexInput;
-  signature: HexInput | Secp256k1Signature | AnySignature;
-  recoveryBit?: number;
+  signature: Secp256k1Signature | AnySignature;
   accountAddress: AccountAddressInput;
+  recoveryBit?: number;
 }): Promise<AnyPublicKey> {
   const { aptosConfig, message, recoveryBit, accountAddress } = args;
-  const signature = toSecp256k1Signature(args.signature);
+  const signature = AnySignature.isInstance(args.signature) ? args.signature : new AnySignature(args.signature);
+
   const { authentication_key: authKeyString } = await getInfo({
     aptosConfig,
     accountAddress,
@@ -853,13 +846,11 @@ export async function verifySecp256k1Account(args: {
   const authKey = new AuthenticationKey({ data: authKeyString });
 
   if (recoveryBit !== undefined) {
-    const publicKey = new AnyPublicKey(
-      Secp256k1PublicKey.fromSignatureAndMessage({
-        signature,
-        message,
-        recoveryBit,
-      }),
-    );
+    const publicKey = AnyPublicKey.fromSecp256k1SignatureAndMessage({
+      signature,
+      message,
+      recoveryBit,
+    });
     const derivedAuthKey = publicKey.authKey();
     if (authKey.toStringWithoutPrefix() === derivedAuthKey.toStringWithoutPrefix()) {
       return publicKey;
@@ -872,13 +863,11 @@ export async function verifySecp256k1Account(args: {
 
   for (let i = 0; i < 4; i += 1) {
     try {
-      const publicKey = new AnyPublicKey(
-        Secp256k1PublicKey.fromSignatureAndMessage({
-          signature,
-          message,
-          recoveryBit: i,
-        }),
-      );
+      const publicKey = AnyPublicKey.fromSecp256k1SignatureAndMessage({
+        signature,
+        message,
+        recoveryBit: i,
+      });
       const derivedAuthKey = publicKey.authKey();
       if (authKey.toStringWithoutPrefix() === derivedAuthKey.toStringWithoutPrefix()) {
         return publicKey;
diff --git a/src/utils/helpers.ts b/src/utils/helpers.ts
index 2a59d259b..d14f94582 100644
--- a/src/utils/helpers.ts
+++ b/src/utils/helpers.ts
@@ -160,4 +160,4 @@ export const isEncodedStruct = (
  */
 export function isHexInput(value: unknown): value is HexInput {
   return value instanceof Uint8Array || typeof value === "string";
-}
\ No newline at end of file
+}