> ## Documentation Index
> Fetch the complete documentation index at: https://hedera-0c6e0218-fix-asset-tokenization-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Update an account

> Modify a Hedera account with AccountUpdateTransaction: change keys, memo, auto-renew period, staking, and max automatic token associations on existing accounts.

A transaction that updates the properties of an existing account. The network will store the latest updates on the account. If you would like to retrieve the state of an account in the past, you can query a mirror node.

<Warning>
  **You cannot add an EVM Address from Public Key to an existing account.** The `alias` is set only at account creation via `setECDSAKeyWithAlias()` / `setKeyWithAlias()` (or the equivalent in your SDK). `AccountUpdateTransaction` has no functional alias setter, so it cannot add or change an account's EVM Address from Public Key. (Some SDKs, such as Java, expose a deprecated `setAliasKey` that has no on-wire effect.)

  If your existing account does not have an EVM Address from Public Key and you need EVM compatibility, the recommended path is to **create a new ECDSA account with the EVM address set at creation** and migrate assets and state. See [Create an Account](/native/accounts/create) for the recommended pattern.

  Rotating keys with `CryptoUpdateTransaction` does **not** update the EVM address. The original EVM Address from Public Key remains tied to the original ECDSA public key.
</Warning>

**Account Properties**

<Card title="Account Properties" href="/learn/core-concepts/accounts/account-properties" />

**Transaction Fees**

* The sender pays for the token association fee and the rent for the first auto-renewal period.
* Please see the transaction and query [fees](/learn/networks/mainnet/fees#transaction-and-query-fees) table for the base transaction fee.
* Please use the [Hedera fee estimator](https://hedera.com/fees) to estimate the cost of your transaction fee.

**Transaction Signing Requirements**

* The account key(s) are required to sign the transaction.
* If you are updating the keys on the account, the OLD KEY and NEW KEY must sign.
  * If either is a key list, the key list keys are all required to sign.
  * If either is a threshold key, the threshold value is required to sign.
* If you do not have the required signatures, the network will throw an `INVALID_SIGNATURE` error.

#### Maximum Auto-Associations and Fees

Accounts have a property, `maxAutoAssociations`, and the property's value determines the maximum number of automatic token associations allowed.

| Property Value | Description                                                                                                                                                                                                                                                                                                                                                                                                                    |
| :------------: | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
|       `0`      | Automatic token associations or token airdrops are not allowed, and the account must be manually associated with a token. This also applies if the value is less than or equal to `usedAutoAssociations`.                                                                                                                                                                                                                      |
|      `-1`      | Unlimited automatic token associations are allowed, and this is the default for accounts created via [auto account creation](/learn/core-concepts/accounts/auto-account-creation) and for accounts that began as hollow accounts and are now complete. Accounts with `-1` can receive new tokens without manually associating them. The sender still pays the `maxAutoAssociations` fee and initial rent for each association. |
|      `> 0`     | If the value is a positive number (number greater than 0), the number of automatic token associations an account can have is limited to that number.                                                                                                                                                                                                                                                                           |

<Info>
  The sender pays the `maxAutoAssociations` fee and the rent for the first auto-renewal period for the association. This is in addition to the typical transfer fees. This ensures the receiver can receive tokens without association and makes it a smoother transfer process.
</Info>

Reference: [HIP-904](https://hips.hedera.com/hip/hip-904)

### Methods

| Method                                            | Type      | Requirement |
| ------------------------------------------------- | --------- | ----------- |
| `setAccountId(<accountId>)`                       | AccountId | Required    |
| `setKey(<key>)`                                   | Key       | Optional    |
| `setReceiverSignatureRequired(<boolean>)`         | Boolean   | Optional    |
| `setMaxAutomaticTokenAssociations(<amount>)`      | int       | Optional    |
| `setAccountMemo(<memo>)`                          | String    | Optional    |
| `setAutoRenewPeriod(<duration>)`                  | Duration  | Optional    |
| `setStakedAccountId(<stakedAccountId>)`           | AccountId | Optional    |
| `setStakedNodeId(<stakedNodeId>)`                 | long      | Optional    |
| `setDeclineStakingReward(<declineStakingReward>)` | boolean   | Optional    |
| `setExpirationTime(<expirationTime>)`             | Instant   | Disabled    |

<CodeGroup>
  ```java Java theme={null}
  //Create the transaction to update the key on the account
  AccountUpdateTransaction transaction = new AccountUpdateTransaction()
      .setAccountId(accountId)
      .setKey(updateKey);

  //Sign the transaction with the old key and new key, submit to a Hedera network
  TransactionResponse txResponse = transaction.freezeWith(client).sign(oldKey).sign(newKey).execute(client);

  //Request the receipt of the transaction
  TransactionReceipt receipt = txResponse.getReceipt(client);

  //Get the transaction consensus status
  Status transactionStatus = receipt.status;

  System.out.println("The transaction consensus status is " +transactionStatus);

  //Version 2.0.0
  ```

  ```javascript JavaScript theme={null}
  //Create the transaction to update the key on the account
  const transaction = await new AccountUpdateTransaction()
      .setAccountId(accountId)
      .setKey(updateKey)
      .freezeWith(client);

  //Sign the transaction with the old key and new key
  const signTx = await (await transaction.sign(oldKey)).sign(newKey);

  //SIgn the transaction with the client operator private key and submit to a Hedera network
  const txResponse = await signTx.execute(client);

  //Request the receipt of the transaction
  const receipt = await txResponse.getReceipt(client);

  //Get the transaction consensus status
  const transactionStatus = receipt.status;

  console.log("The transaction consensus status is " +transactionStatus.toString());

  //v2.0.5
  ```

  ```go Go theme={null}
  //Create the transaction to update the key on the account
  transaction, err := hedera.NewAccountUpdateTransaction().
          SetAccountID(newAccountId).
          SetKey(updateKey.PublicKey()).
          FreezeWith(client)

  if err != nil {
      panic(err)
  }

  //Sign the transaction with the old key and new key, submit to a Hedera network
  txResponse, err := transaction.Sign(newKey).Sign(updateKey).Execute(client)

  //Request the receipt of the transaction
  receipt, err := txResponse.GetReceipt(client)
  if err != nil {
      panic(err)
  }

  //Get the transaction consensus status
  transactionStatus := receipt.Status

  println("The transaction consensus status is ", transactionStatus)

  //Version 2.0.0
  ```

  ```rust Rust theme={null}
  // Create the transaction to update the key on the account
  let transaction = AccountUpdateTransaction::new()
      .account_id(account_id)
      .key(update_key);

  // Sign the transaction with the old key and new key
  let tx_response = transaction
      .freeze_with(&client)?
      .sign(old_key)
      .sign(new_key)
      .execute(&client).await?;

  // Request the receipt of the transaction
  let receipt = tx_response.get_receipt(&client).await?;

  // Get the transaction consensus status
  let status = receipt.status;

  println!("The transaction consensus status is {:?}", status);

  // v0.34.0
  ```
</CodeGroup>

## Get transaction values

Return the properties of an account create transaction.

| Method                           | Type      | Description                                               |
| -------------------------------- | --------- | --------------------------------------------------------- |
| `getKey()`                       | Key       | Returns the public key on the account                     |
| `getInitialBalance()`            | Hbar      | Returns the initial balance of the account                |
| `getReceiverSignatureRequired()` | boolean   | Returns whether the receiver signature is required or not |
| `getExpirationTime()`            | Instant   | Returns the expiration time                               |
| `getAccountMemo()`               | String    | Returns the account memo                                  |
| `getDeclineStakingReward()`      | boolean   | Returns whether or not the account is declining rewards   |
| `getStakedNodeId()`              | long      | Returns the node ID the account is staked to              |
| `getStakedAccountId()`           | AccountId | Returns the account ID the node is staked to              |
| `getAutoRenewPeriod()`           | Duration  | Returns the auto renew period on the account              |

<CodeGroup>
  ```java Java theme={null}
  //Create a transaction
  AccountUpdateTransaction transaction = new AccountUpdateTransaction()
      .setAccountId(accountId)
      .setKey(newKeyUpdate);

  //Get the key on the account
  Key accountKey = transaction.getKey();

  //v2.0.0
  ```

  ```javascript JavaScript theme={null}
  //Create a transaction
  const transaction = new AccountUpdateTransaction()
      .setAccountId(accountId)
      .setKey(newKeyUpdate);

  //Get the key of an account
  const accountKey = transaction.getKey();

  //v2.0.0
  ```

  ```go Go theme={null}
  //Create the transaction 
  transaction, err := hedera.NewAccountUpdateTransaction().
          SetAccountID(newAccountId).
          SetKey(updateKey.PublicKey())

  //Get the key of an account
  accountKey := transaction.GetKey()

  //v2.0.0
  ```
</CodeGroup>