# Token import fails silently on custom networks when address matches a mainnet token

**URL:** <https://community.metamask.com/t/token-import-fails-silently-on-custom-networks-when-address-matches-a-mainnet-token/31461>\
**Category:** Support\
**Created:** [May 19, 2026, 2:30pm UTC](https://community.metamask.com/t/token-import-fails-silently-on-custom-networks-when-address-matches-a-mainnet-token/31461 "2026-05-19T14:30:55Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Dzu](https://avatars.discourse-cdn.com/v4/letter/d/ea5d25/32.png) [@Dzu](https://community.metamask.com/u/Dzu)\
**Post date:** [May 19, 2026, 2:30pm UTC](https://community.metamask.com/t/token-import-fails-silently-on-custom-networks-when-address-matches-a-mainnet-token/31461/1 "2026-05-19T14:30:55Z")

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Hi MetaMask team,

We ran into an issue when using MetaMask connected to a custom network (specifically a Tenderly VNet, which is a fork of Ethereum mainnet).

When trying to import an ERC-20 token by contract address on a custom network, MetaMask displays this warning:

> _“This address matches a known Ethereum Mainnet token address. Recheck the contract address and network for the token you are trying to add.”_

Token details auto-fill correctly, but clicking **Import tokens** does nothing — no error, no confirmation, no token added. The warning is informational so the import should still go through.

Reproduced consistently on a mainnet fork. The same import worked with a different wallet.

Is this a known issue or a bug?

Thanks

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**Author:** ![Oxsoltani](https://dub1.discourse-cdn.com/metamask/user_avatar/community.metamask.com/oxsoltani/32/37719_2.png) [@Oxsoltani](https://community.metamask.com/u/Oxsoltani)\
**Post date:** [May 19, 2026, 2:48pm UTC](https://community.metamask.com/t/token-import-fails-silently-on-custom-networks-when-address-matches-a-mainnet-token/31461/2 "2026-05-19T14:48:00Z")

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The issue might be due to the way tokens are recognized on non-standard networks; MetaMask compares addresses with the mainnet database and does not recognize forks. You can also contact MetaMask support about this . they will probably be able to assist you better

> **[MetaMask Help Center](https://support.metamask.io/)**
>
> MetaMask only offers customer service through this Help Center and our community forums.

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**Author:** ![Oxsoltani](https://dub1.discourse-cdn.com/metamask/user_avatar/community.metamask.com/oxsoltani/32/37719_2.png) [@Oxsoltani](https://community.metamask.com/u/Oxsoltani)\
**Post date:** [May 19, 2026, 2:52pm UTC](https://community.metamask.com/t/token-import-fails-silently-on-custom-networks-when-address-matches-a-mainnet-token/31461/3 "2026-05-19T14:52:56Z")

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You can also first add the network as a custom network, then switch to this network and try to add the token manually and as a custom token again

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**Author:** ![cperkins69](https://avatars.discourse-cdn.com/v4/letter/c/e95f7d/32.png) [@cperkins69](https://community.metamask.com/u/cperkins69)\
**Post date:** [May 25, 2026, 6:41pm UTC](https://community.metamask.com/t/token-import-fails-silently-on-custom-networks-when-address-matches-a-mainnet-token/31461/4 "2026-05-25T18:41:11Z")

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Are they mine this is crap they are just doing that because I’m want my investments back

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**Author:** ![Coffee7643](https://dub1.discourse-cdn.com/metamask/user_avatar/community.metamask.com/coffee7643/32/36480_2.png) [@Coffee7643](https://community.metamask.com/u/Coffee7643)\
**Post date:** [May 26, 2026, 6:28am UTC](https://community.metamask.com/t/token-import-fails-silently-on-custom-networks-when-address-matches-a-mainnet-token/31461/5 "2026-05-26T06:28:15Z")

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Hi @cperkins69, are you facing the same issue the person that created the post is describing?  
If yes please provide more context, screenshots help a lot too! 😃 ☕

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**Author:** ![system](https://europe1.discourse-cdn.com/metamask/original/3X/3/8/3812168020a49f264784b1dbfcf12435abbb09ad.png) [@system](https://community.metamask.com/u/system)\
**Post date:** [June 18, 2026, 2:31pm UTC](https://community.metamask.com/t/token-import-fails-silently-on-custom-networks-when-address-matches-a-mainnet-token/31461/6 "2026-06-18T14:31:01Z")

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Closed on June 18, 2026, 2:31pm UTC

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