diff --git a/apps/namadillo/public/config.toml b/apps/namadillo/public/config.toml
index 9e4e902e0a..70c44d7539 100644
--- a/apps/namadillo/public/config.toml
+++ b/apps/namadillo/public/config.toml
@@ -4,3 +4,4 @@
 #masp_indexer_url = ""
 #localnet_enabled = false
 #fathom_site_id = ""
+#is_heliax_namadillo = false
diff --git a/apps/namadillo/src/atoms/proposals/functions.ts b/apps/namadillo/src/atoms/proposals/functions.ts
index e4f6526222..5e3886e5ea 100644
--- a/apps/namadillo/src/atoms/proposals/functions.ts
+++ b/apps/namadillo/src/atoms/proposals/functions.ts
@@ -25,6 +25,7 @@ import {
   VoteType,
 } from "@namada/types";
 import { assertNever, mapUndefined } from "@namada/utils";
+import { appendNamadilloBranding } from "atoms/settings";
 import BigNumber from "bignumber.js";
 import * as E from "fp-ts/Either";
 import * as t from "io-ts";
@@ -389,6 +390,8 @@ export const createVoteProposalTx = async (
 ): Promise<TransactionPair<VoteProposalProps>> => {
   try {
     const sdk = await getSdkInstance();
+    const memo = appendNamadilloBranding();
+    
     const voteProposalProps = {
       signer: account.address,
       proposalId,
@@ -400,7 +403,8 @@ export const createVoteProposalTx = async (
       gasConfig,
       chain,
       [voteProposalProps],
-      sdk.tx.buildVoteProposal
+      sdk.tx.buildVoteProposal,
+      memo
     );
     return await signEncodedTx(encodedTx, account.address);
   } catch (err) {
diff --git a/apps/namadillo/src/atoms/settings/atoms.ts b/apps/namadillo/src/atoms/settings/atoms.ts
index e223bfc194..47987280f6 100644
--- a/apps/namadillo/src/atoms/settings/atoms.ts
+++ b/apps/namadillo/src/atoms/settings/atoms.ts
@@ -128,6 +128,10 @@ export const rpcUrlAtom = atom((get) => {
   return "";
 });
 
+export const isHeliaxNamadilloAtom = atom((get) => {
+  return get(defaultServerConfigAtom).data?.is_heliax_namadillo ?? false;
+});
+
 export const updateRpcUrlAtom = atomWithMutation(() => {
   return {
     mutationKey: ["update-rpc-url"],
@@ -277,3 +281,20 @@ export const lastInvalidateShieldedContextAtom = atomWithStorage<{
       }
     | undefined;
 }>("namadillo:last-invalidate-shielded-context", {});
+
+/**
+ * Returns a memo with "Powered by Namadillo" appended if this is a Heliax Namadillo instance.
+ * @param userMemo - Optional user-provided memo text
+ * @returns The final memo to use in transactions
+ */
+export const appendNamadilloBranding = (
+  userMemo?: string
+): string | undefined => {
+  const store = getDefaultStore();
+  const isHeliaxNamadillo = store.get(isHeliaxNamadilloAtom);
+  const branding = "Powered by Namadillo";
+
+  if (!isHeliaxNamadillo) return userMemo;
+  else if (userMemo) return `${userMemo} | ${branding}`;
+  else return branding;
+};
diff --git a/apps/namadillo/src/atoms/staking/services.ts b/apps/namadillo/src/atoms/staking/services.ts
index 233c1b0df1..96db1660fb 100644
--- a/apps/namadillo/src/atoms/staking/services.ts
+++ b/apps/namadillo/src/atoms/staking/services.ts
@@ -10,6 +10,7 @@ import {
 } from "@namada/sdk-multicore";
 import { Account } from "@namada/types";
 import { queryClient } from "App/Common/QueryProvider";
+import { appendNamadilloBranding } from "atoms/settings";
 import { EncodedTxData, buildTx } from "lib/query";
 import { Address, AddressBalance, ChainSettings, GasConfig } from "types";
 import { getSdkInstance } from "utils/sdk";
@@ -29,13 +30,16 @@ export const createBondTx = async (
   gasConfig: GasConfig
 ): Promise<EncodedTxData<BondProps> | undefined> => {
   const sdk = await getSdkInstance();
+  const memo = appendNamadilloBranding();
+
   return await buildTx(
     sdk,
     account,
     gasConfig,
     chain,
     bondProps,
-    sdk.tx.buildBond
+    sdk.tx.buildBond,
+    memo
   );
 };
 
@@ -46,13 +50,16 @@ export const createUnbondTx = async (
   gasConfig: GasConfig
 ): Promise<EncodedTxData<UnbondProps>> => {
   const sdk = await getSdkInstance();
+  const memo = appendNamadilloBranding();
+
   return await buildTx(
     sdk,
     account,
     gasConfig,
     chain,
     unbondProps,
-    sdk.tx.buildUnbond
+    sdk.tx.buildUnbond,
+    memo
   );
 };
 
@@ -63,13 +70,16 @@ export const createReDelegateTx = async (
   gasConfig: GasConfig
 ): Promise<EncodedTxData<RedelegateProps>> => {
   const sdk = await getSdkInstance();
+  const memo = appendNamadilloBranding();
+
   return await buildTx(
     sdk,
     account,
     gasConfig,
     chain,
     redelegateProps,
-    sdk.tx.buildRedelegate
+    sdk.tx.buildRedelegate,
+    memo
   );
 };
 
@@ -80,13 +90,16 @@ export const createWithdrawTx = async (
   gasConfig: GasConfig
 ): Promise<EncodedTxData<WithdrawProps>> => {
   const sdk = await getSdkInstance();
+  const memo = appendNamadilloBranding();
+
   return await buildTx(
     sdk,
     account,
     gasConfig,
     chain,
     withdrawProps,
-    sdk.tx.buildWithdraw
+    sdk.tx.buildWithdraw,
+    memo
   );
 };
 
@@ -97,13 +110,16 @@ export const createClaimTx = async (
   gasConfig: GasConfig
 ): Promise<EncodedTxData<ClaimRewardsProps>> => {
   const sdk = await getSdkInstance();
+  const memo = appendNamadilloBranding();
+
   return await buildTx(
     sdk,
     account,
     gasConfig,
     chain,
     params,
-    sdk.tx.buildClaimRewards
+    sdk.tx.buildClaimRewards,
+    memo
   );
 };
 
@@ -150,13 +166,16 @@ export const createClaimAndStakeTx = async (
     }
   });
 
+  const memo = appendNamadilloBranding();
+
   return await buildTx(
     sdk,
     account,
     gasConfig,
     chain,
     claimAndStakingParams,
-    buildClaimRewardsAndStake
+    buildClaimRewardsAndStake,
+    memo
   );
 };
 
diff --git a/apps/namadillo/src/atoms/transfer/services.ts b/apps/namadillo/src/atoms/transfer/services.ts
index 9e7ba4e91f..df7b96a92d 100644
--- a/apps/namadillo/src/atoms/transfer/services.ts
+++ b/apps/namadillo/src/atoms/transfer/services.ts
@@ -13,6 +13,7 @@ import {
   AccountType,
   GenDisposableSignerResponse,
 } from "@namada/types";
+import { appendNamadilloBranding } from "atoms/settings";
 import BigNumber from "bignumber.js";
 import * as Comlink from "comlink";
 import { NamadaKeychain } from "hooks/useNamadaKeychain";
@@ -93,6 +94,8 @@ export const createTransparentTransferTx = async (
   memo?: string
 ): Promise<EncodedTxData<TransparentTransferProps> | undefined> => {
   const sdk = await getSdkInstance();
+  const finalMemo = appendNamadilloBranding(memo);
+
   return await buildTx(
     sdk,
     account,
@@ -100,7 +103,7 @@ export const createTransparentTransferTx = async (
     chain,
     props,
     sdk.tx.buildTransparentTransfer,
-    memo
+    finalMemo
   );
 };
 
@@ -132,6 +135,8 @@ export const createShieldedTransferTx = async (
     ledger.closeTransport();
   }
 
+  const finalMemo = appendNamadilloBranding(memo);
+
   return await workerBuildTxPair({
     rpcUrl,
     nativeToken: chain.nativeTokenAddress,
@@ -151,7 +156,7 @@ export const createShieldedTransferTx = async (
           gasConfig,
           props: [msgValue],
           chain,
-          memo,
+          memo: finalMemo,
         },
       };
       return (await workerLink.shieldedTransfer(msg)).payload;
@@ -184,6 +189,8 @@ export const createShieldingTransferTx = async (
     ledger.closeTransport();
   }
 
+  const finalMemo = appendNamadilloBranding(memo);
+
   return await workerBuildTxPair({
     rpcUrl,
     nativeToken: chain.nativeTokenAddress,
@@ -202,7 +209,7 @@ export const createShieldingTransferTx = async (
           props: [msgValue],
           chain,
           publicKeyRevealed,
-          memo,
+          memo: finalMemo,
         },
       };
       return (await workerLink.shield(msg)).payload;
@@ -239,6 +246,8 @@ export const createUnshieldingTransferTx = async (
     ledger.closeTransport();
   }
 
+  const finalMemo = appendNamadilloBranding(memo);
+
   return await workerBuildTxPair({
     rpcUrl,
     nativeToken: chain.nativeTokenAddress,
@@ -259,7 +268,7 @@ export const createUnshieldingTransferTx = async (
           gasConfig,
           props: [msgValue],
           chain,
-          memo,
+          memo: finalMemo,
         },
       };
       return (await workerLink.unshield(msg)).payload;
@@ -284,6 +293,8 @@ export const createIbcTx = async (
     ledger.closeTransport();
   }
 
+  const finalMemo = appendNamadilloBranding(memo);
+
   return await workerBuildTxPair({
     rpcUrl,
     nativeToken: chain.nativeTokenAddress,
@@ -309,7 +320,7 @@ export const createIbcTx = async (
           gasConfig,
           props: [msgValue],
           chain,
-          memo,
+          memo: finalMemo,
           publicKeyRevealed,
         },
       };
@@ -338,6 +349,7 @@ export const createOsmosisSwapTx = async (
     ledger.closeTransport();
   }
   const { transfer } = props[0];
+  const finalMemo = appendNamadilloBranding(memo);
 
   return await workerBuildTxPair({
     rpcUrl,
@@ -361,7 +373,7 @@ export const createOsmosisSwapTx = async (
           gasConfig,
           props: [msgValue],
           chain,
-          memo,
+          memo: finalMemo,
         },
       };
 
diff --git a/apps/namadillo/src/types.ts b/apps/namadillo/src/types.ts
index b02739eee2..dcfc281eb6 100644
--- a/apps/namadillo/src/types.ts
+++ b/apps/namadillo/src/types.ts
@@ -71,6 +71,7 @@ export type SettingsTomlOptions = {
   rpc_url?: string;
   localnet_enabled?: boolean;
   fathom_site_id?: string;
+  is_heliax_namadillo?: boolean;
 };
 
 export type ChainParameters = {