diff --git a/packages/bcp/src/cosmwasmconnection.spec.ts b/packages/bcp/src/cosmwasmconnection.spec.ts
index e858de22..91fd0495 100644
--- a/packages/bcp/src/cosmwasmconnection.spec.ts
+++ b/packages/bcp/src/cosmwasmconnection.spec.ts
@@ -322,7 +322,7 @@ describe("CosmWasmConnection", () => {
       expect(transaction).toEqual(unsigned);
       expect(signatures.length).toEqual(1);
       expect(signatures[0]).toEqual({
-        nonce: signed.signatures[0].nonce, // This equality check works by pure luck. The implementation is broken. See https://github.com/iov-one/iov-core/pull/1390
+        nonce: -1, // Unfortunately this information is unavailable as previous implementation attempt is broken. See https://github.com/iov-one/iov-core/pull/1390
         pubkey: {
           algo: signed.signatures[0].pubkey.algo,
           data: Secp256k1.compressPubkey(signed.signatures[0].pubkey.data),
diff --git a/packages/bcp/src/cosmwasmconnection.ts b/packages/bcp/src/cosmwasmconnection.ts
index c90047ef..93e102d1 100644
--- a/packages/bcp/src/cosmwasmconnection.ts
+++ b/packages/bcp/src/cosmwasmconnection.ts
@@ -1,5 +1,5 @@
 /* eslint-disable @typescript-eslint/camelcase */
-import { CosmosAddressBech32Prefix, CosmWasmClient, RestClient, TxsResponse, types } from "@cosmwasm/sdk";
+import { CosmosAddressBech32Prefix, CosmWasmClient, RestClient, TxsResponse } from "@cosmwasm/sdk";
 import {
   Account,
   AccountQuery,
@@ -364,30 +364,10 @@ export class CosmWasmConnection implements BlockchainConnection {
   private async parseAndPopulateTxResponseSigned(
     response: TxsResponse,
   ): Promise<ConfirmedAndSignedTransaction<UnsignedTransaction> | FailedTransaction> {
-    const firstMsg = response.tx.value.msg.find(() => true);
-    if (!firstMsg) throw new Error("Got transaction without a first message. What is going on here?");
-
-    // needed to get the (account_number, sequence) for the primary signature
-    let primarySignerAddress: string;
-    if (types.isMsgSend(firstMsg)) {
-      primarySignerAddress = firstMsg.value.from_address;
-    } else if (
-      types.isMsgStoreCode(firstMsg) ||
-      types.isMsgInstantiateContract(firstMsg) ||
-      types.isMsgExecuteContract(firstMsg)
-    ) {
-      primarySignerAddress = firstMsg.value.sender;
-    } else {
-      throw new Error(`Got unsupported type of message: ${firstMsg.type}`);
-    }
-
-    // tslint:disable-next-line: deprecation
-    const accountForHeight = await this.restClient.authAccounts(primarySignerAddress, response.height);
-    const accountNumber = accountForHeight.result.value.account_number;
-    // this is technically not the proper sequence. maybe this causes issues for sig validation?
-    // leaving for now unless it causes issues
-    const sequence = accountForHeight.result.value.sequence - 1;
-    const nonce = accountToNonce(accountNumber, sequence);
+    // There is no known way to get the nonce that was used for signing a transaction.
+    // This information is nesessary for signature validation.
+    // TODO: fix
+    const nonce = -1 as Nonce;
 
     const chainId = this.chainId();
     return parseTxsResponseSigned(chainId, parseInt(response.height, 10), nonce, response, this.bankTokens);
diff --git a/packages/sdk/src/restclient.ts b/packages/sdk/src/restclient.ts
index 8815981d..a8d4b1a5 100644
--- a/packages/sdk/src/restclient.ts
+++ b/packages/sdk/src/restclient.ts
@@ -228,9 +228,8 @@ export class RestClient {
     return Encoding.fromBase64((responseData as EncodeTxResponse).tx);
   }
 
-  public async authAccounts(address: string, height?: string): Promise<AuthAccountsResponse> {
-    const path =
-      height === undefined ? `/auth/accounts/${address}` : `/auth/accounts/${address}?tx.height=${height}`;
+  public async authAccounts(address: string): Promise<AuthAccountsResponse> {
+    const path = `/auth/accounts/${address}`;
     const responseData = await this.get(path);
     if ((responseData as any).result.type !== "cosmos-sdk/Account") {
       throw new Error("Unexpected response data format");
diff --git a/packages/sdk/types/restclient.d.ts b/packages/sdk/types/restclient.d.ts
index a7e87e27..2da34281 100644
--- a/packages/sdk/types/restclient.d.ts
+++ b/packages/sdk/types/restclient.d.ts
@@ -93,7 +93,7 @@ export declare class RestClient {
   blocks(height: number): Promise<BlocksResponse>;
   /** returns the amino-encoding of the transaction performed by the server */
   encodeTx(tx: CosmosSdkTx): Promise<Uint8Array>;
-  authAccounts(address: string, height?: string): Promise<AuthAccountsResponse>;
+  authAccounts(address: string): Promise<AuthAccountsResponse>;
   txs(query: string): Promise<SearchTxsResponse>;
   txsById(id: string): Promise<TxsResponse>;
   postTx(tx: Uint8Array): Promise<PostTxsResponse>;