# Two separate 350 NPT transactions appear to have the same TXID

**URL:** <https://talk.neptune.cash/t/two-separate-350-npt-transactions-appear-to-have-the-same-txid/419>\
**Category:** General\
**Created:** [October 30, 2026, 6:14am UTC](https://talk.neptune.cash/t/two-separate-350-npt-transactions-appear-to-have-the-same-txid/419 "2026-10-30T06:14:29Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![syd1367](https://talk.neptune.cash/letter_avatar_proxy/v4/letter/s/eada6e/32.png) [@syd1367](https://talk.neptune.cash/u/syd1367)\
**Post date:** [October 30, 2026, 6:14am UTC](https://talk.neptune.cash/t/two-separate-350-npt-transactions-appear-to-have-the-same-txid/419/1 "2026-10-30T06:14:29Z")

</div>

Hello Neptune Cash team and community

I need help investigating a problem with two separate NPT transactions I sent to SafeTrade from my Neptune desktop wallet.

I sent 350 NPT twice, one transaction immediately after the other. My wallet balance decreased by 700 NPT, but SafeTrade credited only 350 NPT.

The strange part is that both transactions appear to have the same TXID, but they are associated with different block heights: 59,730 and 59,732.

I checked the TXIDs character by character, and they appear identical. I also checked the block explorer, but I cannot find a clear explanation for what happened to the second 350 NPT transaction.

Could someone please help me investigate the following?

1. Why do the two separate transactions appear to have the same TXID?

2. Why are they associated with different block heights?

3. Was the second 350 NPT transaction successfully broadcast and confirmed?

4. Is there a way to identify and verify the second transaction using the wallet logs, transaction digest, or another method?

---

<div class="post-metadata">

**Author:** ![sword-smith](https://talk.neptune.cash/user_avatar/talk.neptune.cash/sword-smith/32/20_2.png) [@sword-smith](https://talk.neptune.cash/u/sword-smith)\
**Post date:** [October 30, 2026, 10:13am UTC](https://talk.neptune.cash/t/two-separate-350-npt-transactions-appear-to-have-the-same-txid/419/2 "2026-10-30T10:13:46Z")

</div>

The reference implementation `neptune-core` allows you to see transaction output digests for each block. They don’t reveal anything about the transaction but if you send the same UTXO twice, that will show up as a repeated digest.

And blocks 59730 and 59732 do contain a duplicated output:

```auto
$ neptune-cli block-outputs 59730
23af80fc861779303789812bdb4279d5ca085652c8e29420f1eea81044fe783733ece9dfea4a0986
1f7960f6003b2a5891e4cc59027b74dc0c4c9468d1c50614011f1dc0360cd00f1321d9542758ef59
4b29f32fde02dbef5731aee918e1f8991b94a54c1e242122ccd5a5c57e73a4ce8d64e28cff1206f1
9045dd444529004644b166e357714703808494109ec8caf3e8eb3e2504247bd85e6d93b8c01422b7
a71a8e45b02983c386ad7792ee7043027dcc6e57d4c7f0fbfade19bbc20ec1511b765750aa4e72bd
be49d14b86fef373b8042a7f8e4be853f05607f26ed742f08095988500eeb17e530d4733e8a3b8af
cb89c5f8a981dfc8bee3dd1eac0e0698dbc9aafb8581f8e4a7cf814350976e950e322be3d90ff404
efcfd63c52a6a2bbb5dcd8ab9697c93a59f614d45c816cf53102025d82ff63d530d4de02ffd069ce
7b66a9216b740145d0fe241c3bb8c7271c5645aa69605c496268624485882df6fb9a4f643288f67a

```

and

```auto
$ neptune-cli block-outputs 59732
63be52c9ffa082688e22b8ab6d404eea9f42ac32d03e3348b6f02e7352922d65a9e8fefd454a7cc5
a80d0e79654f7d4f3fbd4ab47e109dbde30457e633f0454939f496aa0fba0a79a915ac7d7956eb9b
0ebc3464543c0ff0904b5019bce1c8f2abb8fcccf4723afc61d712cae42987806bdeeed74d54a16d
a17c13c8983d30cdde16f68d82f8fdd0363aaa8c079f71ad6483373a1500392b35de2c5c219090dc
2cfc9a22029df628599533193e392034fea25b70ddf93a11711f756b90f0468805c0bc0ae66e237a
be49d14b86fef373b8042a7f8e4be853f05607f26ed742f08095988500eeb17e530d4733e8a3b8af
4b29f32fde02dbef5731aee918e1f8991b94a54c1e242122ccd5a5c57e73a4ce8d64e28cff1206f1
2639fe3f8eba49f851c23fbebf66f8765cbefb0ae2ce01990cef2e1e0c12be0c44bdf56da73f5a36
601cd1f95708f101be5ff48da5a3c4a0dfe66f977e295c4f2e7db9a617f4cafbc0e066671768cf89

```

The `4b29f32fde02dbef5731aee918e1f8991b94a54c1e242122ccd5a5c57e73a4ce8d64e28cff1206f1` transaction output exists in both blocks. So it looks like a repeated UTXO was made.

The `neptune-core` software does allow for that, and it will credit the wallet with the right amounts. So it should be received by SafeTrade if your details are correct.

So SafeTrade has your coins provided you got the details right. However, the RPC list\_utxos deduplicates its output by addition record, by design and documented at the method. A wallet holding both duplicated UTXOs will only show one row for them, but balances and spending can handle both.