diff --git a/README.md b/README.md
index 43f2ad2..34dcf1d 100644
--- a/README.md
+++ b/README.md
@@ -80,6 +80,7 @@ self.addEventListener('message', async (event) => {
 | `INVALID_JSON_FORMAT` | Deposit data file must be in JSON format
 | `MERKLE_TREE_GENERATION_ERROR` | Failed to generate the Merkle tree
 | `INVALID_PUBLIC_KEY_FORMAT` | Failed to parse deposit data public key
+| `DUPLICATE_DEPOSIT_DATA` | The deposit data file has already been uploaded. 
 | `INVALID_WITHDRAW_ADDRESS` | The withdrawal addresses don’t match Eigen pods
 | `MISSING_FIELDS` | Failed to verify the deposit data public keys. Missing fields: {fields}
 | `DUPLICATE_PUBLIC_KEYS` | Failed to verify the deposit data public keys. All the entries must be unique.
diff --git a/src/parser/depositDataParser.spec.ts b/src/parser/depositDataParser.spec.ts
index 4cabcfd..28fc661 100644
--- a/src/parser/depositDataParser.spec.ts
+++ b/src/parser/depositDataParser.spec.ts
@@ -1,9 +1,13 @@
 import type { FileItem, SupportedNetworks, ParserInput, ParserOutput } from './types'
-import { ErrorTypes, mockData, ParserError } from './helpers'
+import { ErrorTypes, mockData, ParserError, requests } from './helpers'
 import { networkNames } from './verifySignature'
 import { depositDataParser } from './index'
 
 
+type MockVaultInfo = jest.MockedFunction<typeof requests.getVaultInfo>
+
+jest.mock('./helpers/requests/getVaultInfo')
+
 const testData = mockData[0]
 
 const validInput: ParserInput = {
@@ -20,6 +24,9 @@ const validOutput: ParserOutput = {
 }
 
 describe('depositDataParser',() => {
+  afterEach(() => {
+    jest.clearAllMocks()
+  })
 
   it('processes valid input without throwing errors ', async() => {
     await expect(depositDataParser(validInput)).resolves.toEqual(validOutput)
@@ -95,5 +102,17 @@ describe('depositDataParser',() => {
     await expect(depositDataParser({ ...validInput, data: [] })).rejects.toThrow(errorText)
   })
 
+  it('throws ParserError if the deposit data file has already been uploaded', async () => {
+
+    (requests.getVaultInfo as MockVaultInfo).mockResolvedValue({
+      isRestake: false,
+      depositDataRoot: '0x406de60516154112c876f7250d8b289d4e3d840074e8cf755922dd5d3c75d1c0',
+    })
+
+    const errorText = new ParserError(ErrorTypes.DUPLICATE_DEPOSIT_DATA)
+
+    await expect(depositDataParser(validInput)).rejects.toThrow(errorText)
+  })
+
 })
 
diff --git a/src/parser/getDepositData.spec.ts b/src/parser/getDepositData.spec.ts
index 610a943..6cc1381 100644
--- a/src/parser/getDepositData.spec.ts
+++ b/src/parser/getDepositData.spec.ts
@@ -8,6 +8,7 @@ const { pubkey } = mockData[0]
 
 const mockInput = {
   pubkey,
+  isRestake: false,
   vaultAddress: '0x9b6a6867d222d62dc301528190e3984d60adb06b',
 }
 
diff --git a/src/parser/getDepositData.ts b/src/parser/getDepositData.ts
index 887cdfe..b7e1e1c 100644
--- a/src/parser/getDepositData.ts
+++ b/src/parser/getDepositData.ts
@@ -3,7 +3,6 @@ import {
   prefix0x,
   ErrorTypes,
   ParserError,
-  requests,
   getBytes,
   getAmount,
   getEigenPodAddress,
@@ -13,17 +12,16 @@ import {
 
 export type DepositDataInput = {
   pubkey: string
+  isRestake: boolean
   vaultAddress: string
   withdrawalAddress?: string
   network: SupportedNetworks
 }
 
 const getDepositData = async (values: DepositDataInput): Promise<DepositData> => {
-  const { pubkey, vaultAddress, withdrawalAddress, network } = values
+  const { pubkey, vaultAddress, isRestake, withdrawalAddress, network } = values
 
-  const isRestakeVault = await requests.checkIsRestakeVault(vaultAddress, network)
-
-  const withdrawalCredentialAddress = isRestakeVault
+  const withdrawalCredentialAddress = isRestake
     ? await getEigenPodAddress({ vaultAddress, withdrawalAddress, network })
     : vaultAddress
 
diff --git a/src/parser/getPostMessage.ts b/src/parser/getPostMessage.ts
index db7af9c..8939dad 100644
--- a/src/parser/getPostMessage.ts
+++ b/src/parser/getPostMessage.ts
@@ -1,22 +1,28 @@
 import { StandardMerkleTree } from '@openzeppelin/merkle-tree'
 
 import type { DepositDataFile, ParserOutput } from './types'
+import { ParserError, ErrorTypes } from './helpers'
 
 
 type Input = {
   pubkeySet: Set<string>
+  depositDataRoot: string
   treeLeaves: Uint8Array[]
   parsedFile: DepositDataFile
 }
 
 const getPostMessage = (values: Input) => {
-  const { pubkeySet, treeLeaves, parsedFile } = values
+  const { depositDataRoot, pubkeySet, treeLeaves, parsedFile } = values
 
   const merkleTree = StandardMerkleTree.of(
     treeLeaves.map((value, index) => [ value, index ]),
     [ 'bytes', 'uint256' ]
   )
 
+  if (depositDataRoot === merkleTree.root) {
+    throw new ParserError(ErrorTypes.DUPLICATE_DEPOSIT_DATA)
+  }
+
   const postMessage: ParserOutput = {
     merkleRoot: merkleTree.root,
     validators: parsedFile?.length || 0,
diff --git a/src/parser/helpers/errors.ts b/src/parser/helpers/errors.ts
index 745f659..c14d2dc 100644
--- a/src/parser/helpers/errors.ts
+++ b/src/parser/helpers/errors.ts
@@ -2,11 +2,12 @@ type DynamicValues = Record<string, any>
 
 export enum ErrorTypes {
   EMPTY_FILE = 'EMPTY_FILE',
-  EIGEN_PODS_EMPTY = 'EIGEN_PODS_EMPTY',
   MISSING_FIELDS = 'MISSING_FIELDS',
+  EIGEN_PODS_EMPTY = 'EIGEN_PODS_EMPTY',
   INVALID_SIGNATURE = 'INVALID_SIGNATURE',
   INVALID_JSON_FORMAT = 'INVALID_JSON_FORMAT',
   DUPLICATE_PUBLIC_KEYS = 'DUPLICATE_PUBLIC_KEYS',
+  DUPLICATE_DEPOSIT_DATA = 'DUPLICATE_DEPOSIT_DATA',
   INVALID_WITHDRAW_ADDRESS = 'INVALID_WITHDRAW_ADDRESS',
   INVALID_PUBLIC_KEY_FORMAT = 'INVALID_PUBLIC_KEY_FORMAT',
   MERKLE_TREE_GENERATION_ERROR = 'MERKLE_TREE_GENERATION_ERROR',
@@ -18,6 +19,7 @@ export const ErrorMessages: Record<ErrorTypes, string> = {
   [ErrorTypes.INVALID_JSON_FORMAT]: 'Deposit data file must be in JSON format.',
   [ErrorTypes.MERKLE_TREE_GENERATION_ERROR]: 'Failed to generate the Merkle tree',
   [ErrorTypes.INVALID_PUBLIC_KEY_FORMAT]: 'Failed to parse deposit data public key',
+  [ErrorTypes.DUPLICATE_DEPOSIT_DATA]: `The deposit data file has already been uploaded.`,
   [ErrorTypes.INVALID_WITHDRAW_ADDRESS]: `The withdrawal addresses don’t match Eigen pods`,
   [ErrorTypes.MISSING_FIELDS]: 'Failed to verify the deposit data public keys. Missing fields: {fields}',
   [ErrorTypes.DUPLICATE_PUBLIC_KEYS]: 'Failed to verify the deposit data public keys. All the entries must be unique.',
diff --git a/src/parser/helpers/requests/checkIsRestakeVault.ts b/src/parser/helpers/requests/getVaultInfo.ts
similarity index 57%
rename from src/parser/helpers/requests/checkIsRestakeVault.ts
rename to src/parser/helpers/requests/getVaultInfo.ts
index a884cde..c09b828 100644
--- a/src/parser/helpers/requests/checkIsRestakeVault.ts
+++ b/src/parser/helpers/requests/getVaultInfo.ts
@@ -2,19 +2,20 @@ import gqlRequest from './gqlRequest'
 import { SupportedNetworks } from '../../types'
 
 
-const checkIsRestakeVault = async (vaultId: string, network: SupportedNetworks) => {
-  const query = `query Vault($vaultId: ID!) { vault(id: $vaultId) { isRestake }}`
+const getVaultInfo = async (vaultId: string, network: SupportedNetworks) => {
+  const query = `query Vault($vaultId: ID!) { vault(id: $vaultId) { isRestake depositDataRoot }}`
+
   const variables = { vaultId: vaultId.toLowerCase() }
 
   try {
     const data = await gqlRequest({ query, variables }, network)
 
-    return data?.vault?.isRestake
+    return data?.vault
   }
   catch (error) {
-    console.error('Error fetching isRestake:', error)
+    console.error('Error fetching Vault info:', error)
   }
 }
 
 
-export default checkIsRestakeVault
+export default getVaultInfo
diff --git a/src/parser/helpers/requests/index.ts b/src/parser/helpers/requests/index.ts
index 9bf8864..069b5bc 100644
--- a/src/parser/helpers/requests/index.ts
+++ b/src/parser/helpers/requests/index.ts
@@ -1,2 +1,2 @@
 export { default as getEigenPods } from './getEigenPods'
-export { default as checkIsRestakeVault } from './checkIsRestakeVault'
+export { default as getVaultInfo } from './getVaultInfo'
diff --git a/src/parser/index.ts b/src/parser/index.ts
index 6062119..81adc7f 100644
--- a/src/parser/index.ts
+++ b/src/parser/index.ts
@@ -1,4 +1,4 @@
-import { ParserError, ErrorTypes } from './helpers'
+import { ParserError, ErrorTypes, requests } from './helpers'
 
 import initBls from './initBls'
 import getTreeLeaf from './getTreeLeaf'
@@ -19,13 +19,20 @@ export const depositDataParser = async (input: ParserInput) => {
   const pubkeySet = new Set<string>()
   const treeLeaves: Uint8Array[] = []
 
+  const vaultInfo = await requests.getVaultInfo(vaultAddress, network)
+
   for (let index = 0; index < parsedFile.length; index++) {
     const item = parsedFile[index]
     const { pubkey, signature, withdrawal_address } = item
 
     validateFields({ item })
 
-    const depositData = await getDepositData({ pubkey, vaultAddress, withdrawalAddress: withdrawal_address, network })
+    const depositData = await getDepositData({
+      network,
+      pubkey, vaultAddress,
+      isRestake: vaultInfo?.isRestake,
+      withdrawalAddress: withdrawal_address,
+    })
 
     verifySignature({ bls, pubkey, signature, depositData, network })
 
@@ -46,5 +53,10 @@ export const depositDataParser = async (input: ParserInput) => {
     throw new ParserError(ErrorTypes.DUPLICATE_PUBLIC_KEYS)
   }
 
-  return getPostMessage({ pubkeySet, parsedFile, treeLeaves })
+  return getPostMessage({
+    pubkeySet,
+    parsedFile,
+    treeLeaves,
+    depositDataRoot: vaultInfo?.depositDataRoot,
+  })
 }