diff --git a/libs/exchange-module/src/index.ts b/libs/exchange-module/src/index.ts
index e13aadfeeed2..8ebe1a74c18f 100644
--- a/libs/exchange-module/src/index.ts
+++ b/libs/exchange-module/src/index.ts
@@ -158,8 +158,8 @@ export class ExchangeModule extends CustomModule {
     provider: string;
     fromAccountId: string;
     transaction: Transaction;
-    binaryPayload: Buffer;
-    signature: Buffer;
+    binaryPayload: string | Buffer; // Support Coinify Buffer legacy
+    signature: string | Buffer; // Support Coinify Buffer legacy
     feeStrategy: ExchangeCompleteParams["feeStrategy"];
   }): Promise<string> {
     const result = await this.request<ExchangeCompleteParams, ExchangeCompleteResult>(
@@ -169,8 +169,9 @@ export class ExchangeModule extends CustomModule {
         provider,
         fromAccountId,
         rawTransaction: serializeTransaction(transaction),
-        hexBinaryPayload: binaryPayload.toString("hex"),
-        hexSignature: signature.toString("hex"),
+        hexBinaryPayload:
+          typeof binaryPayload === "string" ? binaryPayload : binaryPayload.toString("hex"),
+        hexSignature: typeof signature === "string" ? signature : signature.toString("hex"),
         feeStrategy,
       },
     );
diff --git a/libs/ledger-live-common/src/exchange/platform/transfer/completeExchange.ts b/libs/ledger-live-common/src/exchange/platform/transfer/completeExchange.ts
index a4b8cc3c4ba3..71c131d3a233 100644
--- a/libs/ledger-live-common/src/exchange/platform/transfer/completeExchange.ts
+++ b/libs/ledger-live-common/src/exchange/platform/transfer/completeExchange.ts
@@ -3,7 +3,12 @@ import { firstValueFrom, from, Observable } from "rxjs";
 import { TransportStatusError, WrongDeviceForAccount } from "@ledgerhq/errors";
 
 import { delay } from "../../../promise";
-import { createExchange, ExchangeTypes } from "@ledgerhq/hw-app-exchange";
+import {
+  isExchangeTypeNg,
+  ExchangeTypes,
+  createExchange,
+  PayloadSignatureComputedFormat,
+} from "@ledgerhq/hw-app-exchange";
 import perFamily from "../../../generated/exchange";
 import { getAccountCurrency, getMainAccount } from "../../../account";
 import { getAccountBridge } from "../../../bridge";
@@ -86,11 +91,14 @@ const completeExchange = (
         if (unsubscribed) return;
 
         currentStep = "PROCESS_TRANSACTION";
-        await exchange.processTransaction(Buffer.from(binaryPayload, "hex"), estimatedFees);
+        const { payload, format }: { payload: Buffer; format: PayloadSignatureComputedFormat } =
+          isExchangeTypeNg(exchange.transactionType)
+            ? { payload: Buffer.from("." + binaryPayload), format: "jws" }
+            : { payload: Buffer.from(binaryPayload, "hex"), format: "raw" };
+        await exchange.processTransaction(payload, estimatedFees, format);
         if (unsubscribed) return;
 
-        const bufferSignature = Buffer.from(signature, "hex");
-        const goodSign = convertSignature(bufferSignature, exchangeType);
+        const goodSign = convertSignature(signature, exchange.transactionType);
 
         currentStep = "CHECK_TRANSACTION_SIGNATURE";
         await exchange.checkTransactionSignature(goodSign);
@@ -110,7 +118,7 @@ const completeExchange = (
             estimatedFees: estimatedFees.toString(),
           });
           currentStep = "CHECK_PAYOUT_ADDRESS";
-          await exchange.checkPayoutAddress(
+          await exchange.validatePayoutOrAsset(
             payoutAddressConfig,
             payoutAddressConfigSignature,
             payoutAddressParameters.addressParameters,
@@ -173,17 +181,10 @@ const completeExchange = (
  * @param {ExchangeTypes} exchangeType
  * @return {Buffer} The correct format Buffer for AppExchange call.
  */
-function convertSignature(bufferSignature: Buffer, exchangeType: ExchangeTypes): Buffer {
-  const goodSign =
-    exchangeType === ExchangeTypes.Sell
-      ? bufferSignature
-      : Buffer.from(secp256k1.signatureExport(bufferSignature));
-
-  if (!goodSign) {
-    throw new Error("Could not check provider signature");
-  }
-
-  return goodSign;
+function convertSignature(signature: string, exchangeType: ExchangeTypes): Buffer {
+  return isExchangeTypeNg(exchangeType)
+    ? Buffer.from(signature, "base64url")
+    : <Buffer>secp256k1.signatureExport(Buffer.from(signature, "hex"));
 }
 
 export default completeExchange;
diff --git a/libs/ledger-live-common/src/exchange/swap/completeExchange.ts b/libs/ledger-live-common/src/exchange/swap/completeExchange.ts
index bb382c795fef..54659f02b70e 100644
--- a/libs/ledger-live-common/src/exchange/swap/completeExchange.ts
+++ b/libs/ledger-live-common/src/exchange/swap/completeExchange.ts
@@ -115,7 +115,7 @@ const completeExchange = (
 
         try {
           currentStep = "CHECK_PAYOUT_ADDRESS";
-          await exchange.checkPayoutAddress(
+          await exchange.validatePayoutOrAsset(
             payoutAddressConfig,
             payoutAddressConfigSignature,
             payoutAddressParameters.addressParameters,
diff --git a/libs/ledger-live-common/src/exchange/swap/initSwap.ts b/libs/ledger-live-common/src/exchange/swap/initSwap.ts
index ff5f0060faa0..b1965fdc42c1 100644
--- a/libs/ledger-live-common/src/exchange/swap/initSwap.ts
+++ b/libs/ledger-live-common/src/exchange/swap/initSwap.ts
@@ -203,7 +203,7 @@ const initSwap = (input: InitSwapInput): Observable<SwapRequestEvent> => {
           await getCurrencyExchangeConfig(payoutCurrency);
 
         try {
-          await swap.checkPayoutAddress(
+          await swap.validatePayoutOrAsset(
             payoutAddressConfig,
             payoutAddressConfigSignature,
             payoutAddressParameters.addressParameters,
diff --git a/libs/ledgerjs/packages/hw-app-exchange/src/Exchange.ts b/libs/ledgerjs/packages/hw-app-exchange/src/Exchange.ts
index e663b393de4a..2a2a84f44ffc 100644
--- a/libs/ledgerjs/packages/hw-app-exchange/src/Exchange.ts
+++ b/libs/ledgerjs/packages/hw-app-exchange/src/Exchange.ts
@@ -30,9 +30,9 @@ const CHECK_PARTNER_COMMAND = 0x05;
 const PROCESS_TRANSACTION_RESPONSE = 0x06;
 const CHECK_TRANSACTION_SIGNATURE = 0x07;
 const CHECK_PAYOUT_ADDRESS = 0x08;
-const CHECK_ASSET_IN = 0x08;
 const CHECK_REFUND_ADDRESS = 0x09;
 const SIGN_COIN_TRANSACTION = 0x0a;
+const CHECK_ASSET_IN_AND_DISPLAY = 0x0b;
 
 // Extension for PROCESS_TRANSACTION_RESPONSE APDU
 const P2_NONE = 0x00 << 4;
@@ -260,7 +260,7 @@ export default class Exchange {
     maybeThrowProtocolError(result);
   }
 
-  async checkPayoutAddress(
+  async validatePayoutOrAsset(
     payoutCurrencyConfig: Buffer,
     currencyConfigSignature: Buffer,
     addressParameters: Buffer,
@@ -280,7 +280,9 @@ export default class Exchange {
     ]);
     const result: Buffer = await this.transport.send(
       0xe0,
-      this.transactionType === ExchangeTypes.Swap ? CHECK_PAYOUT_ADDRESS : CHECK_ASSET_IN,
+      this.transactionType === ExchangeTypes.Swap || this.transactionType === ExchangeTypes.SwapNg
+        ? CHECK_PAYOUT_ADDRESS
+        : CHECK_ASSET_IN_AND_DISPLAY,
       this.transactionRate,
       this.transactionType,
       bufferToSend,