diff --git a/position/position.gno b/position/position.gno
index 1d37bfff..34a04027 100644
--- a/position/position.gno
+++ b/position/position.gno
@@ -714,12 +714,7 @@ func Reposition(
 	oldTickLower := position.tickLower
 	oldTickUpper := position.tickUpper
 
-	if !(position.isClear()) {
-		panic(addDetailToError(
-			errNotClear,
-			ufmt.Sprintf("position(%d) isn't clear(liquidity:%s, tokensOwed0:%s, tokensOwed1:%s)", tokenId, position.liquidity.ToString(), position.tokensOwed0.ToString(), position.tokensOwed1.ToString()),
-		))
-	}
+	checkPositionHasClear(position)
 
 	token0, token1, _ := splitOf(position.poolKey)
 	// check if gnot pool
@@ -950,14 +945,6 @@ func isAuthorizedForToken(tokenId uint64) {
 	}
 }
 
-func verifyTokenIdAndOwnership(tokenId uint64) {
-	assertTokenExists(tokenId)
-
-	owner := gnft.OwnerOf(tokenIdFrom(tokenId))
-	caller := std.PrevRealm().Addr()
-	assertCallerIsOwner(tokenId, owner, caller)
-}
-
 func calculateLiquidityToRemove(positionLiquidity *u256.Uint, liquidityRatio uint64) *u256.Uint {
 	liquidityToRemove := new(u256.Uint).Mul(positionLiquidity, u256.NewUint(liquidityRatio))
 	liquidityToRemove = new(u256.Uint).Div(liquidityToRemove, u256.NewUint(100))
@@ -968,15 +955,6 @@ func calculateLiquidityToRemove(positionLiquidity *u256.Uint, liquidityRatio uin
 	return liquidityToRemove
 }
 
-func verifyBurnedAmounts(burnedAmount0, burnedAmount1, amount0Min, amount1Min *u256.Uint) {
-	if !(burnedAmount0.Gte(amount0Min) && burnedAmount1.Gte(amount1Min)) {
-		panic(addDetailToError(
-			errSlippage,
-			ufmt.Sprintf("burnedAmount0(%s) >= amount0Min(%s) && burnedAmount1(%s) >= amount1Min(%s)", burnedAmount0.ToString(), amount0Min.ToString(), burnedAmount1.ToString(), amount1Min.ToString()),
-		))
-	}
-}
-
 func handleUnwrap(pToken0, pToken1 string, unwrapResult bool, userOldWugnotBalance uint64, to std.Address) {
 	if (pToken0 == consts.WRAPPED_WUGNOT || pToken1 == consts.WRAPPED_WUGNOT) && unwrapResult {
 		userNewWugnotBalance := wugnot.BalanceOf(a2u(to))
diff --git a/position/utils.gno b/position/utils.gno
index c91bf346..bd26ea90 100644
--- a/position/utils.gno
+++ b/position/utils.gno
@@ -163,6 +163,23 @@ func assertOnlyValidAddressWith(prevAddr, otherAddr std.Address) {
 	}
 }
 
+func verifyTokenIdAndOwnership(tokenId uint64) {
+	assertTokenExists(tokenId)
+
+	owner := gnft.OwnerOf(tokenIdFrom(tokenId))
+	caller := std.PrevRealm().Addr()
+	assertCallerIsOwner(tokenId, owner, caller)
+}
+
+func verifyBurnedAmounts(burnedAmount0, burnedAmount1, amount0Min, amount1Min *u256.Uint) {
+	if !(burnedAmount0.Gte(amount0Min) && burnedAmount1.Gte(amount1Min)) {
+		panic(addDetailToError(
+			errSlippage,
+			ufmt.Sprintf("burnedAmount0(%s) >= amount0Min(%s) && burnedAmount1(%s) >= amount1Min(%s)", burnedAmount0.ToString(), amount0Min.ToString(), burnedAmount1.ToString(), amount1Min.ToString()),
+		))
+	}
+}
+
 // region: helper
 
 func GetOrigPkgAddr() std.Address {