diff --git a/x/auth/migrations/legacytx/stdsign.go b/x/auth/migrations/legacytx/stdsign.go
index 5e31a88f612..dbe04471395 100644
--- a/x/auth/migrations/legacytx/stdsign.go
+++ b/x/auth/migrations/legacytx/stdsign.go
@@ -45,6 +45,7 @@ type StdSignDoc struct {
 }
 
 // StdSignBytes returns the bytes to sign for a transaction.
+// Deprecated: Please use x/tx/signing/aminojson instead.
 func StdSignBytes(chainID string, accnum, sequence, timeout uint64, fee StdFee, msgs []sdk.Msg, memo string, tip *tx.Tip) []byte {
 	msgsBytes := make([]json.RawMessage, 0, len(msgs))
 	for _, msg := range msgs {
diff --git a/x/auth/tx/legacy_amino_json.go b/x/auth/tx/legacy_amino_json.go
index 1be6ce542f8..3d7f1efcae0 100644
--- a/x/auth/tx/legacy_amino_json.go
+++ b/x/auth/tx/legacy_amino_json.go
@@ -22,18 +22,22 @@ type signModeLegacyAminoJSONHandler struct{}
 
 // NewSignModeLegacyAminoJSONHandler returns a new signModeLegacyAminoJSONHandler.
 // Note: The public constructor is only used for testing.
+// Deprecated: Please use x/tx/signing/aminojson instead.
 func NewSignModeLegacyAminoJSONHandler() signing.SignModeHandler {
 	return signModeLegacyAminoJSONHandler{}
 }
 
+// Deprecated: Please use x/tx/signing/aminojson instead.
 func (s signModeLegacyAminoJSONHandler) DefaultMode() signingtypes.SignMode {
 	return signingtypes.SignMode_SIGN_MODE_LEGACY_AMINO_JSON
 }
 
+// Deprecated: Please use x/tx/signing/aminojson instead.
 func (s signModeLegacyAminoJSONHandler) Modes() []signingtypes.SignMode {
 	return []signingtypes.SignMode{signingtypes.SignMode_SIGN_MODE_LEGACY_AMINO_JSON}
 }
 
+// Deprecated: Please use x/tx/signing/aminojson instead.
 func (s signModeLegacyAminoJSONHandler) GetSignBytes(mode signingtypes.SignMode, data signing.SignerData, tx sdk.Tx) ([]byte, error) {
 	if mode != signingtypes.SignMode_SIGN_MODE_LEGACY_AMINO_JSON {
 		return nil, fmt.Errorf("expected %s, got %s", signingtypes.SignMode_SIGN_MODE_LEGACY_AMINO_JSON, mode)