diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f15d65c37ab..e797f20787c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,6 +36,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## Unreleased
 
+### Improvements
+
+* [\#10327](https://github.com/cosmos/cosmos-sdk/pull/10327) Add null guard for possible nil `Amount` in tx fee `Coins`
+
 ### Bug Fixes
 
 * (client) [#10226](https://github.com/cosmos/cosmos-sdk/pull/10226) Fix --home flag parsing. 
diff --git a/types/coin.go b/types/coin.go
index b86cff51865e..2749edadc7fb 100644
--- a/types/coin.go
+++ b/types/coin.go
@@ -129,6 +129,11 @@ func (coin Coin) IsNegative() bool {
 	return coin.Amount.Sign() == -1
 }
 
+// IsNil returns true if the coin amount is nil and false otherwise.
+func (coin Coin) IsNil() bool {
+	return coin.Amount.i == nil
+}
+
 //-----------------------------------------------------------------------------
 // Coins
 
@@ -543,6 +548,19 @@ func (coins Coins) IsAnyNegative() bool {
 	return false
 }
 
+// IsAnyNil returns true if there is at least one coin whose amount
+// is nil; returns false otherwise. It returns false if the coin set
+// is empty too.
+func (coins Coins) IsAnyNil() bool {
+	for _, coin := range coins {
+		if coin.IsNil() {
+			return true
+		}
+	}
+
+	return false
+}
+
 // negative returns a set of coins with all amount negative.
 //
 // TODO: Remove once unsigned integers are used.
diff --git a/types/coin_test.go b/types/coin_test.go
index ab69f16a17db..bb1d00f1380a 100644
--- a/types/coin_test.go
+++ b/types/coin_test.go
@@ -237,6 +237,20 @@ func (s *coinTestSuite) TestCoinIsZero() {
 	s.Require().False(res)
 }
 
+func (s *coinTestSuite) TestCoinIsNil() {
+	coin := sdk.Coin{}
+	res := coin.IsNil()
+	s.Require().True(res)
+
+	coin = sdk.Coin{Denom: "uatom"}
+	res = coin.IsNil()
+	s.Require().True(res)
+
+	coin = sdk.NewInt64Coin(testDenom1, 1)
+	res = coin.IsNil()
+	s.Require().False(res)
+}
+
 func (s *coinTestSuite) TestFilteredZeroCoins() {
 	cases := []struct {
 		name     string
@@ -902,6 +916,19 @@ func (s *coinTestSuite) TestCoinsIsAnyGT() {
 	}
 }
 
+func (s *coinTestSuite) TestCoinsIsAnyNil() {
+	twoAtom := sdk.NewInt64Coin("atom", 2)
+	fiveAtom := sdk.NewInt64Coin("atom", 5)
+	threeEth := sdk.NewInt64Coin("eth", 3)
+	nilAtom := sdk.Coin{Denom: "atom"}
+
+	s.Require().True(sdk.Coins{twoAtom, fiveAtom, threeEth, nilAtom}.IsAnyNil())
+	s.Require().True(sdk.Coins{twoAtom, nilAtom, fiveAtom, threeEth}.IsAnyNil())
+	s.Require().True(sdk.Coins{nilAtom, twoAtom, fiveAtom, threeEth}.IsAnyNil())
+	s.Require().False(sdk.Coins{twoAtom, fiveAtom, threeEth}.IsAnyNil())
+
+}
+
 func (s *coinTestSuite) TestMarshalJSONCoins() {
 	cdc := codec.NewLegacyAmino()
 	sdk.RegisterLegacyAminoCodec(cdc)
diff --git a/types/tx/types.go b/types/tx/types.go
index 0392b2fcfd08..65313f735b7a 100644
--- a/types/tx/types.go
+++ b/types/tx/types.go
@@ -72,6 +72,13 @@ func (t *Tx) ValidateBasic() error {
 		)
 	}
 
+	if fee.Amount.IsAnyNil() {
+		return sdkerrors.Wrapf(
+			sdkerrors.ErrInsufficientFee,
+			"invalid fee provided: null",
+		)
+	}
+
 	if fee.Amount.IsAnyNegative() {
 		return sdkerrors.Wrapf(
 			sdkerrors.ErrInsufficientFee,