diff --git a/CHANGELOG.md b/CHANGELOG.md
index 313effca..3320df96 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- added: Add optional `memoIndex` to otherParams to force output index of OP_RETURN
+
 ## 3.8.4 (2025-08-20)
 
 - changed: Update blockbook servers
diff --git a/src/common/utxobased/engine/UtxoEngine.ts b/src/common/utxobased/engine/UtxoEngine.ts
index b68f8400..cc4ff6bd 100644
--- a/src/common/utxobased/engine/UtxoEngine.ts
+++ b/src/common/utxobased/engine/UtxoEngine.ts
@@ -541,6 +541,7 @@ export async function makeUtxoEngine(
       )
       const txOptions = spendInfoOtherParams.txOptions ?? {}
       const {
+        memoIndex,
         outputSort,
         utxoSourceAddress,
         forceChangeAddress
@@ -669,6 +670,7 @@ export async function makeUtxoEngine(
         freshChangeAddress,
         subtractFee,
         log,
+        memoIndex,
         outputSort
       })
       if (tx.changeUsed) {
diff --git a/src/common/utxobased/engine/types.ts b/src/common/utxobased/engine/types.ts
index cac93725..f5c179dd 100644
--- a/src/common/utxobased/engine/types.ts
+++ b/src/common/utxobased/engine/types.ts
@@ -2,6 +2,7 @@ import {
   asArray,
   asBoolean,
   asMaybe,
+  asNumber,
   asObject,
   asOptional,
   asString,
@@ -53,6 +54,7 @@ export const asUtxoSpendInfoOtherParams = asObject({
   /** @deprecated use `EdgeSpendInfo['enableRbf']` */
   enableRbf: asOptional(asBoolean),
   forceChangeAddress: asOptional(asString),
+  memoIndex: asOptional(asNumber),
   outputSort: asOptional(asOutputSort, 'bip69'),
   txOptions: asOptional(asTxOptions),
   utxoSourceAddress: asOptional(asString)
diff --git a/src/common/utxobased/keymanager/keymanager.ts b/src/common/utxobased/keymanager/keymanager.ts
index 7e760510..17a84718 100644
--- a/src/common/utxobased/keymanager/keymanager.ts
+++ b/src/common/utxobased/keymanager/keymanager.ts
@@ -235,6 +235,7 @@ export interface MakeTxArgs {
   subtractFee?: boolean
   log?: EdgeLog
   outputSort: 'bip69' | 'targets'
+  memoIndex?: number
 }
 
 export interface MakeTxTarget {
@@ -949,7 +950,7 @@ export function signMessageBase64(message: string, privateKey: string): string {
 }
 
 export function makeTx(args: MakeTxArgs): MakeTxReturn {
-  const { log, outputSort, memos } = args
+  const { log, outputSort, memos, memoIndex } = args
   let sequence = 0xffffffff
   if (args.enableRbf) {
     sequence -= 2
@@ -1102,6 +1103,16 @@ export function makeTx(args: MakeTxArgs): MakeTxReturn {
     }
   })()
 
+  if (memoIndex != null) {
+    const currentMemoIndex = sortedOutputs.findIndex(
+      output => output.value === 0
+    )
+    if (currentMemoIndex !== -1) {
+      const memoOutput = sortedOutputs.splice(currentMemoIndex, 1)
+      sortedOutputs.splice(memoIndex, 0, memoOutput[0])
+    }
+  }
+
   const psbt = new Psbt()
   try {
     psbt.addInputs(sortedInputs)