diff --git a/x/ibc/nft-transfer/types/packet.go b/x/ibc/nft-transfer/types/packet.go
index 236856e1..d3e30105 100644
--- a/x/ibc/nft-transfer/types/packet.go
+++ b/x/ibc/nft-transfer/types/packet.go
@@ -62,10 +62,16 @@ func (nftpd NonFungibleTokenPacketData) ValidateBasic() error {
 	if len(nftpd.TokenIds) != len(nftpd.TokenData) || len(nftpd.TokenIds) != len(nftpd.TokenUris) {
 		return errors.Wrap(ErrInvalidPacket, "all token infos should have same length")
 	}
+	seenTokens := make(map[string]struct{})
 	for _, tokenId := range nftpd.TokenIds {
-		if len(tokenId) == 0 {
-			return errors.Wrap(ErrInvalidTokenIds, "invalid zero length token id")
-		}
+			if len(tokenId) == 0 {
+					return errors.Wrap(ErrInvalidTokenIds, "invalid zero length token id")
+			}
+			// check duplicate
+			if _, exists := seenTokens[tokenId]; exists {
+					return errors.Wrapf(ErrInvalidTokenIds, "duplicate token id: %s", tokenId)
+			}
+			seenTokens[tokenId] = struct{}{}
 	}
 	return ValidatePrefixedClassId(nftpd.ClassId)
 }
diff --git a/x/ibc/nft-transfer/types/packet_test.go b/x/ibc/nft-transfer/types/packet_test.go
index 8beac499..56a4cf2f 100644
--- a/x/ibc/nft-transfer/types/packet_test.go
+++ b/x/ibc/nft-transfer/types/packet_test.go
@@ -27,6 +27,7 @@ func TestNonFungibleTokenPacketDataValidateBasic(t *testing.T) {
 		{"invalid token uris", NewNonFungibleTokenPacketData(classId, "", "", []string{"1", "2"}, []string{""}, []string{"", ""}, addr1, addr2, ""), false},
 		{"missing sender address", NewNonFungibleTokenPacketData(classId, "", "", []string{"1", "2", "3"}, []string{"", "", ""}, []string{"", "", ""}, emptyAddr, addr2, ""), false},
 		{"missing recipient address", NewNonFungibleTokenPacketData(classId, "", "", []string{"1", "2", "3"}, []string{"", "", ""}, []string{"", "", ""}, addr1, emptyAddr, ""), false},
+		{"duplicate token ids", NewNonFungibleTokenPacketData(classId, "", "", []string{"1", "2", "3", "1"}, []string{"", "", "", ""}, []string{"", "", "", ""}, addr1, addr2, ""), false},
 	}
 
 	for i, tc := range testCases {