diff --git a/packages/arb-token-bridge-ui/src/token-bridge-sdk/CctpTransferStarter.ts b/packages/arb-token-bridge-ui/src/token-bridge-sdk/CctpTransferStarter.ts
index 09d126e0fe..42b7ae8d6e 100644
--- a/packages/arb-token-bridge-ui/src/token-bridge-sdk/CctpTransferStarter.ts
+++ b/packages/arb-token-bridge-ui/src/token-bridge-sdk/CctpTransferStarter.ts
@@ -11,7 +11,11 @@ import {
 } from './BridgeTransferStarter'
 import { formatAmount } from '../util/NumberUtils'
 import { fetchPerMessageBurnLimit, getCctpContracts } from './cctp'
-import { getChainIdFromProvider, getAddressFromSigner } from './utils'
+import {
+  getChainIdFromProvider,
+  getAddressFromSigner,
+  validateSignerChainId
+} from './utils'
 import { fetchErc20Allowance } from '../util/TokenUtils'
 import { TokenMessengerAbi } from '../util/cctp/TokenMessengerAbi'
 import { Address } from '../util/AddressUtils'
@@ -84,9 +88,13 @@ export class CctpTransferStarter extends BridgeTransferStarter {
   }
 
   public async transfer({ signer, amount, destinationAddress }: TransferProps) {
+    const address = await getAddressFromSigner(signer)
     const sourceChainId = await getChainIdFromProvider(this.sourceChainProvider)
 
-    const address = await getAddressFromSigner(signer)
+    await validateSignerChainId({
+      signer,
+      sourceChainIdOrProvider: sourceChainId
+    })
 
     // cctp has an upper limit for transfer
     const burnLimit = await fetchPerMessageBurnLimit({
diff --git a/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20DepositStarter.ts b/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20DepositStarter.ts
index a5f5200cbe..3aa9c2aa33 100644
--- a/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20DepositStarter.ts
+++ b/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20DepositStarter.ts
@@ -1,5 +1,6 @@
 import {
   Erc20Bridger,
+  getArbitrumNetwork,
   scaleFrom18DecimalsToNativeTokenDecimals
 } from '@arbitrum/sdk'
 import { BigNumber, constants, utils } from 'ethers'
@@ -20,8 +21,13 @@ import {
   fetchErc20Allowance,
   fetchErc20ParentChainGatewayAddress
 } from '../util/TokenUtils'
-import { getAddressFromSigner, percentIncrease } from './utils'
+import {
+  getAddressFromSigner,
+  percentIncrease,
+  validateSignerChainId
+} from './utils'
 import { depositTokenEstimateGas } from '../util/TokenDepositUtils'
+import { addressIsSmartContract } from '../util/AddressUtils'
 
 // https://github.com/OffchainLabs/arbitrum-sdk/blob/main/src/lib/message/L1ToL2MessageGasEstimator.ts#L33
 export const DEFAULT_GAS_PRICE_PERCENT_INCREASE = BigNumber.from(500)
@@ -297,6 +303,14 @@ export class Erc20DepositStarter extends BridgeTransferStarter {
 
     const address = await getAddressFromSigner(signer)
     const erc20Bridger = await this.getBridger()
+    const destinationChainId = (
+      await this.destinationChainProvider.getNetwork()
+    ).chainId
+
+    await validateSignerChainId({
+      signer,
+      sourceChainIdOrProvider: this.sourceChainProvider
+    })
 
     const depositRequest = await erc20Bridger.getDepositRequest({
       parentProvider: this.sourceChainProvider,
@@ -313,6 +327,25 @@ export class Erc20DepositStarter extends BridgeTransferStarter {
       ...overrides
     })
 
+    const depositToAddress = depositRequest.txRequest.to.toLowerCase()
+
+    if (!addressIsSmartContract(depositToAddress, this.sourceChainProvider)) {
+      throw new Error(
+        `Parent chain token gateway router address provided is not a smart contract address.`
+      )
+    }
+
+    const parentGatewayRouterAddressForChain =
+      getArbitrumNetwork(
+        destinationChainId
+      ).tokenBridge?.parentGatewayRouter.toLowerCase()
+
+    if (depositToAddress !== parentGatewayRouterAddressForChain) {
+      throw new Error(
+        `Wrong token gateway router address on parent chain. Expected ${parentGatewayRouterAddressForChain}, got ${depositToAddress} instead.`
+      )
+    }
+
     const gasLimit = await this.sourceChainProvider.estimateGas(
       depositRequest.txRequest
     )
diff --git a/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20TeleportStarter.ts b/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20TeleportStarter.ts
index f4fee31dbb..14619e6348 100644
--- a/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20TeleportStarter.ts
+++ b/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20TeleportStarter.ts
@@ -12,8 +12,13 @@ import {
   TransferType
 } from './BridgeTransferStarter'
 import { fetchErc20Allowance } from '../util/TokenUtils'
-import { getAddressFromSigner, percentIncrease } from './utils'
+import {
+  getAddressFromSigner,
+  percentIncrease,
+  validateSignerChainId
+} from './utils'
 import { getL2ConfigForTeleport } from './teleport'
+import { addressIsSmartContract } from '../util/AddressUtils'
 
 export class Erc20TeleportStarter extends BridgeTransferStarter {
   public transferType: TransferType = 'erc20_teleport'
@@ -175,6 +180,11 @@ export class Erc20TeleportStarter extends BridgeTransferStarter {
 
     const address = await getAddressFromSigner(signer)
 
+    await validateSignerChainId({
+      signer,
+      sourceChainIdOrProvider: this.sourceChainProvider
+    })
+
     const l2Provider = await this.getL2Provider()
 
     const l1l3Bridger = await this.getBridger()
@@ -189,6 +199,23 @@ export class Erc20TeleportStarter extends BridgeTransferStarter {
       l3Provider: this.destinationChainProvider
     })
 
+    const depositToAddress = depositRequest.txRequest.to.toLowerCase()
+
+    if (!addressIsSmartContract(depositToAddress, this.sourceChainProvider)) {
+      throw new Error(
+        `Teleporter transfer address provided is not a smart contract address.`
+      )
+    }
+
+    const l1TeleporterAddress =
+      l1l3Bridger.l2Network.teleporter?.l1Teleporter.toLowerCase()
+
+    if (depositToAddress !== l1TeleporterAddress) {
+      throw new Error(
+        `Wrong address for teleporter transfer to destination chain. Expected ${l1TeleporterAddress}, got ${depositToAddress} instead.`
+      )
+    }
+
     const tx = await l1l3Bridger.deposit({
       txRequest: depositRequest.txRequest,
       l1Signer: signer
diff --git a/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20WithdrawalStarter.ts b/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20WithdrawalStarter.ts
index 8ee9f51ac2..5f40a3d411 100644
--- a/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20WithdrawalStarter.ts
+++ b/packages/arb-token-bridge-ui/src/token-bridge-sdk/Erc20WithdrawalStarter.ts
@@ -1,4 +1,4 @@
-import { Erc20Bridger } from '@arbitrum/sdk'
+import { Erc20Bridger, getArbitrumNetwork } from '@arbitrum/sdk'
 import { BigNumber, constants } from 'ethers'
 import { ERC20__factory } from '@arbitrum/sdk/dist/lib/abi/factories/ERC20__factory'
 import {
@@ -17,7 +17,8 @@ import {
 import {
   getAddressFromSigner,
   getChainIdFromProvider,
-  percentIncrease
+  percentIncrease,
+  validateSignerChainId
 } from './utils'
 import { tokenRequiresApprovalOnL2 } from '../util/L2ApprovalUtils'
 import { withdrawInitTxEstimateGas } from '../util/WithdrawalUtils'
@@ -188,6 +189,13 @@ export class Erc20WithdrawalStarter extends BridgeTransferStarter {
   }
 
   public async transfer({ amount, signer, destinationAddress }: TransferProps) {
+    const sourceChainId = await getChainIdFromProvider(this.sourceChainProvider)
+
+    await validateSignerChainId({
+      signer,
+      sourceChainIdOrProvider: sourceChainId
+    })
+
     if (!this.sourceChainErc20Address) {
       throw Error('Erc20 token address not found')
     }
@@ -197,8 +205,6 @@ export class Erc20WithdrawalStarter extends BridgeTransferStarter {
 
     const address = await getAddressFromSigner(signer)
 
-    const sourceChainId = await getChainIdFromProvider(this.sourceChainProvider)
-
     const isSmartContractWallet = await addressIsSmartContract(
       address,
       sourceChainId
@@ -219,6 +225,25 @@ export class Erc20WithdrawalStarter extends BridgeTransferStarter {
       amount
     })
 
+    const withdrawToAddress = request.txRequest.to.toLowerCase()
+
+    if (!addressIsSmartContract(withdrawToAddress, this.sourceChainProvider)) {
+      throw new Error(
+        `Child chain token gateway router address provided is not a smart contract address.`
+      )
+    }
+
+    const childGatewayRouterAddressForChain =
+      getArbitrumNetwork(
+        sourceChainId
+      ).tokenBridge?.childGatewayRouter.toLowerCase()
+
+    if (withdrawToAddress !== childGatewayRouterAddressForChain) {
+      throw new Error(
+        `Wrong token gateway router address on child chain. Expected ${childGatewayRouterAddressForChain}, got ${withdrawToAddress} instead.`
+      )
+    }
+
     const tx = await erc20Bridger.withdraw({
       ...request,
       childSigner: signer,
diff --git a/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthDepositStarter.ts b/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthDepositStarter.ts
index 54d636aaaf..dca9a7fc76 100644
--- a/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthDepositStarter.ts
+++ b/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthDepositStarter.ts
@@ -1,5 +1,6 @@
 import {
   EthBridger,
+  getArbitrumNetwork,
   scaleFrom18DecimalsToNativeTokenDecimals
 } from '@arbitrum/sdk'
 import { BigNumber, Signer } from 'ethers'
@@ -12,10 +13,15 @@ import {
   TransferProps,
   TransferType
 } from './BridgeTransferStarter'
-import { getAddressFromSigner, percentIncrease } from './utils'
+import {
+  getAddressFromSigner,
+  percentIncrease,
+  validateSignerChainId
+} from './utils'
 import { depositEthEstimateGas } from '../util/EthDepositUtils'
 import { fetchErc20Allowance } from '../util/TokenUtils'
 import { isCustomDestinationAddressTx } from '../state/app/utils'
+import { addressIsSmartContract } from '../util/AddressUtils'
 import { DEFAULT_GAS_PRICE_PERCENT_INCREASE } from './Erc20DepositStarter'
 import { fetchNativeCurrency } from '../hooks/useNativeCurrency'
 
@@ -170,12 +176,20 @@ export class EthDepositStarter extends BridgeTransferStarter {
   public async transfer({ amount, signer, destinationAddress }: TransferProps) {
     const address = await getAddressFromSigner(signer)
     const ethBridger = await this.getBridger()
+    const destinationChainId = (
+      await this.destinationChainProvider.getNetwork()
+    ).chainId
 
     const isDifferentDestinationAddress = isCustomDestinationAddressTx({
       sender: address,
       destination: destinationAddress
     })
 
+    await validateSignerChainId({
+      signer,
+      sourceChainIdOrProvider: this.sourceChainProvider
+    })
+
     const depositRequest = isDifferentDestinationAddress
       ? await ethBridger.getDepositToRequest({
           amount,
@@ -190,6 +204,21 @@ export class EthDepositStarter extends BridgeTransferStarter {
           from: address
         })
 
+    const depositToAddress = depositRequest.txRequest.to.toLowerCase()
+
+    if (!addressIsSmartContract(depositToAddress, this.sourceChainProvider)) {
+      throw new Error(`Inbox address provided is not a smart contract address.`)
+    }
+
+    const inboxAddressForChain =
+      getArbitrumNetwork(destinationChainId).ethBridge.inbox.toLowerCase()
+
+    if (depositToAddress !== inboxAddressForChain) {
+      throw new Error(
+        `Wrong inbox address for destination chain. Expected ${inboxAddressForChain}, got ${depositToAddress} instead.`
+      )
+    }
+
     const gasLimit = await this.sourceChainProvider.estimateGas(
       depositRequest.txRequest
     )
diff --git a/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthTeleportStarter.ts b/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthTeleportStarter.ts
index 57cf90756e..c1bb23cdb3 100644
--- a/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthTeleportStarter.ts
+++ b/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthTeleportStarter.ts
@@ -9,7 +9,12 @@ import {
   TransferType
 } from './BridgeTransferStarter'
 import { getL2ConfigForTeleport } from './teleport'
-import { getAddressFromSigner, percentIncrease } from './utils'
+import {
+  getAddressFromSigner,
+  percentIncrease,
+  validateSignerChainId
+} from './utils'
+import { addressIsSmartContract } from '../util/AddressUtils'
 
 export class EthTeleportStarter extends BridgeTransferStarter {
   public transferType: TransferType = 'eth_teleport'
@@ -107,6 +112,11 @@ export class EthTeleportStarter extends BridgeTransferStarter {
   public async transfer({ amount, signer }: TransferProps) {
     const address = await getAddressFromSigner(signer)
 
+    await validateSignerChainId({
+      signer,
+      sourceChainIdOrProvider: this.sourceChainProvider
+    })
+
     const l2Provider = await this.getL2Provider()
 
     const l1l3Bridger = await this.getBridger()
@@ -120,6 +130,21 @@ export class EthTeleportStarter extends BridgeTransferStarter {
       l3Provider: this.destinationChainProvider
     })
 
+    const depositToAddress = depositRequest.txRequest.to.toLowerCase()
+
+    if (!addressIsSmartContract(depositToAddress, this.sourceChainProvider)) {
+      throw new Error(`Inbox address provided is not a smart contract address.`)
+    }
+
+    const inboxAddressForChain =
+      l1l3Bridger.l2Network.ethBridge.inbox.toLowerCase()
+
+    if (depositToAddress !== inboxAddressForChain) {
+      throw new Error(
+        `Wrong inbox address for teleporter transfer to destination chain. Expected ${inboxAddressForChain}, got ${depositToAddress} instead.`
+      )
+    }
+
     const tx = await l1l3Bridger.deposit({
       ...depositRequest,
       l1Signer: signer
diff --git a/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthWithdrawalStarter.ts b/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthWithdrawalStarter.ts
index a759e0d625..aca8f07824 100644
--- a/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthWithdrawalStarter.ts
+++ b/packages/arb-token-bridge-ui/src/token-bridge-sdk/EthWithdrawalStarter.ts
@@ -1,13 +1,19 @@
 import { BigNumber } from 'ethers'
 import { EthBridger } from '@arbitrum/sdk'
+import { ARB_SYS_ADDRESS } from '@arbitrum/sdk/dist/lib/dataEntities/constants'
 import {
   BridgeTransferStarter,
   TransferEstimateGas,
   TransferProps,
   TransferType
 } from './BridgeTransferStarter'
-import { getAddressFromSigner, percentIncrease } from './utils'
+import {
+  getAddressFromSigner,
+  percentIncrease,
+  validateSignerChainId
+} from './utils'
 import { withdrawInitTxEstimateGas } from '../util/WithdrawalUtils'
+import { addressIsSmartContract } from '../util/AddressUtils'
 
 export class EthWithdrawalStarter extends BridgeTransferStarter {
   public transferType: TransferType = 'eth_withdrawal'
@@ -49,12 +55,31 @@ export class EthWithdrawalStarter extends BridgeTransferStarter {
     const address = await getAddressFromSigner(signer)
     const ethBridger = await EthBridger.fromProvider(this.sourceChainProvider)
 
+    await validateSignerChainId({
+      signer,
+      sourceChainIdOrProvider: this.sourceChainProvider
+    })
+
     const request = await ethBridger.getWithdrawalRequest({
       amount,
       destinationAddress: destinationAddress ?? address,
       from: address
     })
 
+    const withdrawToAddress = request.txRequest.to
+
+    if (!addressIsSmartContract(withdrawToAddress, this.sourceChainProvider)) {
+      throw new Error(
+        `Native currency withdrawal request address is not a smart contract address.`
+      )
+    }
+
+    if (withdrawToAddress.toLowerCase() !== ARB_SYS_ADDRESS.toLowerCase()) {
+      throw new Error(
+        `Native currency withdrawal request address must be the ArbSys address ${ARB_SYS_ADDRESS} instead of ${withdrawToAddress}.`
+      )
+    }
+
     const tx = await ethBridger.withdraw({
       ...request,
       childSigner: signer,
diff --git a/packages/arb-token-bridge-ui/src/token-bridge-sdk/utils.ts b/packages/arb-token-bridge-ui/src/token-bridge-sdk/utils.ts
index 54e7483bbf..97617759fb 100644
--- a/packages/arb-token-bridge-ui/src/token-bridge-sdk/utils.ts
+++ b/packages/arb-token-bridge-ui/src/token-bridge-sdk/utils.ts
@@ -120,3 +120,24 @@ export function getProviderForChainId(chainId: ChainId): StaticJsonRpcProvider {
 
   return createProviderWithCache(chainId)
 }
+
+export async function validateSignerChainId({
+  signer,
+  sourceChainIdOrProvider
+}: {
+  signer: Signer
+  sourceChainIdOrProvider: number | Provider
+}) {
+  const signerChainId = await signer.getChainId()
+
+  const sourceChainId =
+    typeof sourceChainIdOrProvider === 'number'
+      ? sourceChainIdOrProvider
+      : await getChainIdFromProvider(sourceChainIdOrProvider)
+
+  if (signerChainId !== sourceChainId) {
+    throw new Error(
+      `Signer is on chain ${signerChainId} but should be on chain ${sourceChainId}. Please try again after connecting to the correct chain in your wallet.`
+    )
+  }
+}
diff --git a/packages/arb-token-bridge-ui/src/util/AddressUtils.ts b/packages/arb-token-bridge-ui/src/util/AddressUtils.ts
index 9e15ef0750..a97a37f6ec 100644
--- a/packages/arb-token-bridge-ui/src/util/AddressUtils.ts
+++ b/packages/arb-token-bridge-ui/src/util/AddressUtils.ts
@@ -5,8 +5,15 @@ import { getProviderForChainId } from '../token-bridge-sdk/utils'
 
 export type Address = `0x${string}`
 
-export async function addressIsSmartContract(address: string, chainId: number) {
-  const provider = getProviderForChainId(chainId)
+export async function addressIsSmartContract(
+  address: string,
+  chainIdOrProvider: number | Provider
+) {
+  const provider =
+    typeof chainIdOrProvider === 'number'
+      ? getProviderForChainId(chainIdOrProvider)
+      : chainIdOrProvider
+
   try {
     return (await provider.getCode(address)).length > 2
   } catch (_) {