diff --git a/contracts/adapters/KycOnboarding.sol b/contracts/adapters/KycOnboarding.sol
index e2aaa3648..073788f12 100644
--- a/contracts/adapters/KycOnboarding.sol
+++ b/contracts/adapters/KycOnboarding.sol
@@ -80,6 +80,10 @@ contract KycOnboardingContract is
 
     mapping(DaoRegistry => mapping(address => uint256)) public totalUnits;
 
+    // Tracks the hashes of coupons that were redeemed
+    // hashCouponMessage(dao, Coupon(kycedMember)) => bool
+    mapping(bytes32 => bool) public redeemedCoupons;
+
     constructor(address payable weth) {
         _weth = WETH(weth);
         _weth20 = IERC20(weth);
@@ -245,13 +249,16 @@ contract KycOnboardingContract is
             !isActiveMember(dao, dao.getCurrentDelegateKey(kycedMember)),
             "already member"
         );
+        bytes32 couponHash = hashCouponMessage(dao, Coupon(kycedMember));
+        require(!redeemedCoupons[couponHash], "already redeemed");
         uint256 maxMembers = dao.getConfiguration(
             _configKey(tokenAddr, MaxMembers)
         );
         require(maxMembers > 0, "token not configured");
         require(dao.getNbMembers() < maxMembers, "the DAO is full");
 
-        _checkKycCoupon(dao, kycedMember, tokenAddr, signature);
+        _checkKycCoupon(dao, kycedMember, tokenAddr, couponHash, signature);
+        redeemedCoupons[couponHash] = true;
 
         OnboardingDetails memory details = _checkData(dao, tokenAddr, amount);
         totalUnits[dao][tokenAddr] += details.unitsRequested;
@@ -376,13 +383,11 @@ contract KycOnboardingContract is
         DaoRegistry dao,
         address kycedMember,
         address tokenAddr,
+        bytes32 couponHash,
         bytes memory signature
     ) internal view {
         require(
-            ECDSA.recover(
-                hashCouponMessage(dao, Coupon(kycedMember)),
-                signature
-            ) ==
+            ECDSA.recover(couponHash, signature) ==
                 dao.getAddressConfiguration(
                     _configKey(tokenAddr, SignerAddressConfig)
                 ),
diff --git a/contracts/adapters/voting/OffchainVoting.sol b/contracts/adapters/voting/OffchainVoting.sol
index ba1872c10..1aeecb1f1 100644
--- a/contracts/adapters/voting/OffchainVoting.sol
+++ b/contracts/adapters/voting/OffchainVoting.sol
@@ -372,10 +372,13 @@ contract OffchainVotingContract is
             "result weight too low"
         );
 
+        // check whether the new result changes the outcome
         if (
             vote.gracePeriodStartingTime == 0 ||
-            // check whether the new result changes the outcome
-            vote.nbNo > vote.nbYes != result.nbNo > result.nbYes
+            // changed from yes to no or from no to yes
+            vote.nbNo > vote.nbYes != result.nbNo > result.nbYes ||
+            // changed from tie to yes/no or from yes/no to tie
+            ((vote.nbNo == vote.nbYes) != (result.nbNo == result.nbYes))
         ) {
             vote.gracePeriodStartingTime = uint64(block.timestamp);
         }
diff --git a/contracts/companion/Reimbursement.sol b/contracts/companion/Reimbursement.sol
index 5ce06cdd2..0b766cd92 100644
--- a/contracts/companion/Reimbursement.sol
+++ b/contracts/companion/Reimbursement.sol
@@ -106,15 +106,14 @@ contract ReimbursementContract is IReimbursement, AdapterGuard, GelatoRelay {
             return (false, 0);
         }
 
-        if (bank.balanceOf(DaoHelper.GUILD, DaoHelper.ETH_TOKEN) < gasLeft) {
+        uint256 payback = gasLeft * tx.gasprice;
+        if (bank.balanceOf(DaoHelper.GUILD, DaoHelper.ETH_TOKEN) < payback) {
             return (false, 0);
         }
 
         uint256 spendLimitPeriod = dao.getConfiguration(SpendLimitPeriod);
         uint256 spendLimitEth = dao.getConfiguration(SpendLimitEth);
 
-        uint256 payback = gasLeft * tx.gasprice;
-
         if (
             //slither-disable-next-line timestamp
             block.timestamp - _data[address(dao)].rateLimitStart <
diff --git a/contracts/extensions/erc1155/ERC1155TokenExtension.sol b/contracts/extensions/erc1155/ERC1155TokenExtension.sol
index fc2a98aee..b39d970ee 100644
--- a/contracts/extensions/erc1155/ERC1155TokenExtension.sol
+++ b/contracts/extensions/erc1155/ERC1155TokenExtension.sol
@@ -378,7 +378,7 @@ contract ERC1155TokenExtension is IExtension, IERC1155Receiver {
             _saveNft(msg.sender, ids[i], DaoHelper.GUILD, values[i]);
         }
 
-        return this.onERC1155Received.selector;
+        return this.onERC1155BatchReceived.selector;
     }
 
     /**
diff --git a/test/adapters/kyc-onboarding.test.js b/test/adapters/kyc-onboarding.test.js
index 83e104650..4f850d4f2 100644
--- a/test/adapters/kyc-onboarding.test.js
+++ b/test/adapters/kyc-onboarding.test.js
@@ -361,4 +361,68 @@ describe("Adapter - KYC Onboarding", () => {
       "too much funds"
     );
   });
+
+  it("should not be possible to rejoin the DAO using a coupon that was already redeemed", async () => {
+    const applicant = accounts[2];
+
+    const dao = this.dao;
+    const bank = this.extensions.bankExt;
+    const onboarding = this.adapters.kycOnboarding;
+    const ragequit = this.adapters.ragequit;
+
+    // remaining amount to test sending back to proposer
+    const ethAmount = unitPrice.mul(toBN(3)).add(remaining);
+
+    const signerUtil = SigUtilSigner(signer.privKey);
+
+    const couponData = {
+      type: "coupon-kyc",
+      kycedMember: applicant,
+    };
+
+    let jsHash = getMessageERC712Hash(
+      couponData,
+      dao.address,
+      onboarding.address,
+      1
+    );
+    let solHash = await onboarding.hashCouponMessage(dao.address, couponData);
+    expect(jsHash).equal(solHash);
+
+    const signature = signerUtil(
+      couponData,
+      dao.address,
+      onboarding.address,
+      1
+    );
+
+    await onboarding.onboardEth(dao.address, applicant, signature, {
+      from: applicant,
+      value: ethAmount,
+      gasPrice: toBN("0"),
+    });
+
+    // test active member status
+    expect(await isMember(bank, applicant)).equal(true);
+
+    // Ragequit - Burn all the member units and exit the DAO
+    const memberUnits = await bank.balanceOf(applicant, UNITS);
+    await ragequit.ragequit(dao.address, memberUnits, toBN(0), [ETH_TOKEN], {
+      from: applicant,
+      gasPrice: toBN("0"),
+    });
+
+    // test active member status
+    expect(await isMember(bank, applicant)).equal(false);
+
+    // Attempt to rejoin the DAO using the same KYC coupon
+    await expectRevert(
+      onboarding.onboardEth(dao.address, applicant, signature, {
+        from: applicant,
+        value: ethAmount,
+        gasPrice: toBN("0"),
+      }),
+      "already redeemed"
+    );
+  });
 });