diff --git a/CHANGELOG.md b/CHANGELOG.md
index a75f6041..9b125a02 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 - Fix missing ICA controller configuration [#257](https://github.com/atomone-hub/atomone/pull/257)
 - Fix wrapper converters for `x/gov` [#276](https://github.com/atomone-hub/atomone/pull/276)
 - Add min-stake filtering for cosmos-sdk votes in the gov ante handler [#279](https://github.com/atomone-hub/atomone/pull/279)
+- Oversight DAO and Steering DAO addresses cannot be the same [#309](https://github.com/atomone-hub/atomone/pull/309)
 
 ### DEPENDENCIES
 
diff --git a/x/coredaos/keeper/msg_server_test.go b/x/coredaos/keeper/msg_server_test.go
index 86a10916..973ca3e6 100644
--- a/x/coredaos/keeper/msg_server_test.go
+++ b/x/coredaos/keeper/msg_server_test.go
@@ -1,6 +1,7 @@
 package keeper_test
 
 import (
+	"strings"
 	"testing"
 	"time"
 
@@ -18,10 +19,11 @@ import (
 
 func TestMsgServerUpdateParams(t *testing.T) {
 	timeDuration := time.Duration(1)
-	testAcc := simtestutil.CreateRandomAccounts(3)
+	testAcc := simtestutil.CreateRandomAccounts(4)
 	bondedAcc := testAcc[0].String()
 	unbondingAcc := testAcc[1].String()
 	unbondedAcc := testAcc[2].String()
+	unbondedAcc2 := testAcc[3].String()
 
 	tests := []struct {
 		name        string
@@ -188,16 +190,44 @@ func TestMsgServerUpdateParams(t *testing.T) {
 				Authority: "cosmos10d07y265gmmuvt4z0w9aw880jnsr700j6zn9kn",
 				Params: types.Params{
 					SteeringDaoAddress:            unbondedAcc,
-					OversightDaoAddress:           unbondedAcc,
+					OversightDaoAddress:           unbondedAcc2,
 					VotingPeriodExtensionDuration: &timeDuration,
 				},
 			},
 			setupMocks: func(ctx sdk.Context, m *testutil.Mocks) {
 				// Address is not bonded or in unbonding
-				m.StakingKeeper.EXPECT().GetDelegatorBonded(ctx, sdk.MustAccAddressFromBech32(unbondedAcc)).Return(math.NewInt(0), nil).Times(2)
-				m.StakingKeeper.EXPECT().GetDelegatorUnbonding(ctx, sdk.MustAccAddressFromBech32(unbondedAcc)).Return(math.NewInt(0), nil).Times(2)
+				m.StakingKeeper.EXPECT().GetDelegatorBonded(ctx, sdk.MustAccAddressFromBech32(unbondedAcc)).Return(math.NewInt(0), nil)
+				m.StakingKeeper.EXPECT().GetDelegatorUnbonding(ctx, sdk.MustAccAddressFromBech32(unbondedAcc)).Return(math.NewInt(0), nil)
+				m.StakingKeeper.EXPECT().GetDelegatorBonded(ctx, sdk.MustAccAddressFromBech32(unbondedAcc2)).Return(math.NewInt(0), nil)
+				m.StakingKeeper.EXPECT().GetDelegatorUnbonding(ctx, sdk.MustAccAddressFromBech32(unbondedAcc2)).Return(math.NewInt(0), nil)
 			},
 		},
+		{
+			name: "steeringdao and oversight same address",
+			msg: &types.MsgUpdateParams{
+				Authority: "cosmos10d07y265gmmuvt4z0w9aw880jnsr700j6zn9kn",
+				Params: types.Params{
+					SteeringDaoAddress:            unbondedAcc,
+					OversightDaoAddress:           unbondedAcc,
+					VotingPeriodExtensionDuration: &timeDuration,
+				},
+			},
+			expectedErr: "steering DAO address and oversight DAO address cannot be the same: " + unbondedAcc,
+			setupMocks:  func(ctx sdk.Context, m *testutil.Mocks) {},
+		},
+		{
+			name: "steeringdao and oversight same address but different case",
+			msg: &types.MsgUpdateParams{
+				Authority: "cosmos10d07y265gmmuvt4z0w9aw880jnsr700j6zn9kn",
+				Params: types.Params{
+					SteeringDaoAddress:            unbondedAcc,
+					OversightDaoAddress:           strings.ToUpper(unbondedAcc),
+					VotingPeriodExtensionDuration: &timeDuration,
+				},
+			},
+			expectedErr: "steering DAO address and oversight DAO address cannot be the same: " + unbondedAcc,
+			setupMocks:  func(ctx sdk.Context, m *testutil.Mocks) {},
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
diff --git a/x/coredaos/types/params.go b/x/coredaos/types/params.go
index dea3ebcf..67185846 100644
--- a/x/coredaos/types/params.go
+++ b/x/coredaos/types/params.go
@@ -42,20 +42,31 @@ func DefaultParams() Params {
 
 // Validate validates the set of params
 func (p Params) ValidateBasic() error {
+	var (
+		steeringDaoAddr  sdk.AccAddress
+		oversightDaoAddr sdk.AccAddress
+		err              error
+	)
+
 	// Steering DAO address can only be empty (disabled) or a valid Bech32 address
 	if p.SteeringDaoAddress != "" {
-		if _, err := sdk.AccAddressFromBech32(p.SteeringDaoAddress); err != nil {
+		if steeringDaoAddr, err = sdk.AccAddressFromBech32(p.SteeringDaoAddress); err != nil {
 			return fmt.Errorf("invalid steering DAO address: %s: %w", p.SteeringDaoAddress, err)
 		}
 	}
 
 	// Oversight DAO address can only be empty (disabled) or a valid Bech32 address
 	if p.OversightDaoAddress != "" {
-		if _, err := sdk.AccAddressFromBech32(p.OversightDaoAddress); err != nil {
+		if oversightDaoAddr, err = sdk.AccAddressFromBech32(p.OversightDaoAddress); err != nil {
 			return fmt.Errorf("invalid oversight DAO address: %s: %w", p.OversightDaoAddress, err)
 		}
 	}
 
+	// Oversight DAO cannot be the same as the Steering DAO
+	if p.SteeringDaoAddress != "" && p.OversightDaoAddress != "" && steeringDaoAddr.Equals(oversightDaoAddr) {
+		return fmt.Errorf("steering DAO address and oversight DAO address cannot be the same: %s", p.SteeringDaoAddress)
+	}
+
 	// VotingPeriodExtensionDuration must be a positive duration
 	if p.VotingPeriodExtensionDuration == nil {
 		return fmt.Errorf("voting period extension duration must not be nil")