diff --git a/packages/backend/src/accounting/tigerbeetle/accounts.ts b/packages/backend/src/accounting/tigerbeetle/accounts.ts
index e1658821a1..39e6ca299f 100644
--- a/packages/backend/src/accounting/tigerbeetle/accounts.ts
+++ b/packages/backend/src/accounting/tigerbeetle/accounts.ts
@@ -6,7 +6,7 @@ import {
 
 import { ServiceDependencies, TigerBeetleAccountCode } from './service'
 import { TigerbeetleCreateAccountError } from './errors'
-import { AccountId, toTigerbeetleId, AccountUserData128 } from './utils'
+import { AccountId, toTigerBeetleId, AccountUserData128 } from './utils'
 
 export interface CreateAccountOptions {
   id: AccountId
@@ -22,7 +22,7 @@ export async function createAccounts(
 ): Promise<void> {
   const errors = await deps.tigerBeetle.createAccounts(
     accounts.map((account) => ({
-      id: toTigerbeetleId(account.id),
+      id: toTigerBeetleId(account.id),
       user_data_32: 0,
       user_data_64: 0n,
       user_data_128: 0n,
@@ -56,7 +56,7 @@ export function flagsBasedOnAccountOptions(
     options.code === TigerBeetleAccountCode.SETTLEMENT
       ? AccountFlags.credits_must_not_exceed_debits
       : AccountFlags.debits_must_not_exceed_credits
-  if (options.linked) returnVal = returnVal | AccountFlags.linked
+  if (options.linked) returnVal |= AccountFlags.linked
   return returnVal
 }
 
@@ -65,7 +65,7 @@ export async function getAccounts(
   accountIds: AccountId[]
 ): Promise<Account[]> {
   return await deps.tigerBeetle.lookupAccounts(
-    accountIds.map((id) => toTigerbeetleId(id))
+    accountIds.map((id) => toTigerBeetleId(id))
   )
 }
 
diff --git a/packages/backend/src/accounting/tigerbeetle/service.ts b/packages/backend/src/accounting/tigerbeetle/service.ts
index b7ba227a2a..b8c32ab3f2 100644
--- a/packages/backend/src/accounting/tigerbeetle/service.ts
+++ b/packages/backend/src/accounting/tigerbeetle/service.ts
@@ -25,7 +25,7 @@ import {
   areAllAccountExistsErrors
 } from './errors'
 import { NewTransferOptions, createTransfers } from './transfers'
-import { AccountUserData128, toTigerbeetleId } from './utils'
+import { AccountUserData128, toTigerBeetleId } from './utils'
 
 export enum TigerBeetleAccountCode {
   LIQUIDITY_WEB_MONETIZATION = 1,
@@ -134,7 +134,7 @@ export async function createSettlementAccount(
         ledger,
         code: TigerBeetleAccountCode.SETTLEMENT,
         linked: false,
-        userData128: toTigerbeetleId(accountId)
+        userData128: toTigerBeetleId(accountId)
       }
     ])
   } catch (err) {
@@ -216,7 +216,7 @@ export async function getAccountsTotalSent(
     const accounts = await getAccounts(deps, ids)
     return ids.map(
       (id) =>
-        accounts.find((account) => account.id === toTigerbeetleId(id))
+        accounts.find((account) => account.id === toTigerBeetleId(id))
           ?.debits_posted
     )
   } else return []
@@ -240,7 +240,7 @@ export async function getAccountsTotalReceived(
     const accounts = await getAccounts(deps, ids)
     return ids.map(
       (id) =>
-        accounts.find((account) => account.id === toTigerbeetleId(id))
+        accounts.find((account) => account.id === toTigerBeetleId(id))
           ?.credits_posted
     )
   } else return []
diff --git a/packages/backend/src/accounting/tigerbeetle/transfers.ts b/packages/backend/src/accounting/tigerbeetle/transfers.ts
index d8fb28582d..5109945f85 100644
--- a/packages/backend/src/accounting/tigerbeetle/transfers.ts
+++ b/packages/backend/src/accounting/tigerbeetle/transfers.ts
@@ -8,7 +8,7 @@ import { TransferError } from '../errors'
 
 import { TigerbeetleCreateTransferError } from './errors'
 import { ServiceDependencies } from './service'
-import { AccountId, toTigerbeetleId } from './utils'
+import { AccountId, toTigerBeetleId } from './utils'
 
 const ACCOUNT_TYPE = 1
 
@@ -17,7 +17,13 @@ type TransfersError = {
   error: TransferError
 }
 
-export interface NewTransferOptions {
+export type TransferUserData128 = string | number | bigint
+
+interface TransferOptions {
+  userData128?: TransferUserData128
+}
+
+export interface NewTransferOptions extends TransferOptions {
   id: string | bigint
   sourceAccountId: AccountId
   destinationAccountId: AccountId
@@ -28,13 +34,13 @@ export interface NewTransferOptions {
   voidId?: never
 }
 
-export interface PostTransferOptions {
+export interface PostTransferOptions extends TransferOptions {
   id?: never
   postId: string | bigint
   voidId?: never
 }
 
-export interface VoidTransferOptions {
+export interface VoidTransferOptions extends TransferOptions {
   id?: never
   postId?: never
   voidId: string | bigint
@@ -74,33 +80,31 @@ export async function createTransfers(
       timestamp: 0n
     }
     if (isNewTransferOptions(transfer)) {
-      if (transfer.amount <= BigInt(0)) {
-        return { index: i, error: TransferError.InvalidAmount }
-      }
-      tbTransfer.id = toTigerbeetleId(transfer.id)
+      if (transfer.amount <= 0n) return { index: i, error: TransferError.InvalidAmount }
+
+      tbTransfer.id = toTigerBeetleId(transfer.id)
       tbTransfer.amount = transfer.amount
       tbTransfer.ledger = transfer.ledger
-      tbTransfer.debit_account_id = toTigerbeetleId(transfer.sourceAccountId)
-      tbTransfer.credit_account_id = toTigerbeetleId(
-        transfer.destinationAccountId
-      )
+      tbTransfer.debit_account_id = toTigerBeetleId(transfer.sourceAccountId)
+      tbTransfer.credit_account_id = toTigerBeetleId(transfer.destinationAccountId)
       if (transfer.timeout) {
         tbTransfer.flags |= TransferFlags.pending
         tbTransfer.timeout = transfer.timeout
       }
     } else {
-      tbTransfer.id = toTigerbeetleId(uuid())
+      tbTransfer.id = toTigerBeetleId(uuid())
       if (transfer.postId) {
         tbTransfer.flags |= TransferFlags.post_pending_transfer
-        tbTransfer.pending_id = toTigerbeetleId(transfer.postId)
+        tbTransfer.pending_id = toTigerBeetleId(transfer.postId)
       } else if (transfer.voidId) {
         tbTransfer.flags |= TransferFlags.void_pending_transfer
-        tbTransfer.pending_id = toTigerbeetleId(transfer.voidId)
+        tbTransfer.pending_id = toTigerBeetleId(transfer.voidId)
       }
     }
-    if (i < transfers.length - 1) {
-      tbTransfer.flags |= TransferFlags.linked
-    }
+
+    if (transfer.userData128) tbTransfer.user_data_128 = toTigerBeetleId(transfer.userData128)
+
+    if (i < transfers.length - 1) tbTransfer.flags |= TransferFlags.linked
     tbTransfers.push(tbTransfer)
   }
   const res = await deps.tigerBeetle.createTransfers(tbTransfers)
diff --git a/packages/backend/src/accounting/tigerbeetle/utils.ts b/packages/backend/src/accounting/tigerbeetle/utils.ts
index c2904845f1..1f6b8d2c77 100644
--- a/packages/backend/src/accounting/tigerbeetle/utils.ts
+++ b/packages/backend/src/accounting/tigerbeetle/utils.ts
@@ -3,7 +3,7 @@ import { validateId } from '../../shared/utils'
 export type AccountId = string | number | bigint
 export type AccountUserData128 = AccountId
 
-export function toTigerbeetleId(id: AccountId): bigint {
+export function toTigerBeetleId(id: AccountId): bigint {
   if (typeof id === 'number') {
     return BigInt(id)
   }