# Wallet Verification Ethereum Testnet Error

**URL:** https://community.blockcerts.org/t/wallet-verification-ethereum-testnet-error/3255
**Category:** Support
**Created:** [July 12, 2022, 7:13pm UTC](https://community.blockcerts.org/t/wallet-verification-ethereum-testnet-error/3255 "2022-07-12T19:13:36Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![mary.tellez](https://sea2.discourse-cdn.com/flex016/user_avatar/community.blockcerts.org/mary.tellez/32/856_2.png) [@mary.tellez](https://community.blockcerts.org/u/mary.tellez)
#### Post date: [July 12, 2022, 7:13pm UTC](https://community.blockcerts.org/t/wallet-verification-ethereum-testnet-error/3255/1 "2022-07-12T19:13:36Z")

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Hello, when I create my signed certificate with the cert-issuer tool and import it into my wallet, after clicking on the verify option, it returns this:

 ![photo_2022-07-12_12-41-09](https://us1.discourse-cdn.com/flex016/uploads/blockcerts/original/1X/e56ab58eefb85a2229f3016f0e4f41940f2ab7e0.jpeg)  
What does this means. Please, help.

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<div class="post-metadata">

### Author: ![lemoustachiste](https://avatars.discourse-cdn.com/v4/letter/l/7c8e57/32.png) [@lemoustachiste](https://community.blockcerts.org/u/lemoustachiste)
#### Post date: [July 13, 2022, 4:18pm UTC](https://community.blockcerts.org/t/wallet-verification-ethereum-testnet-error/3255/2 "2022-07-13T16:18:21Z")

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the error is thrown from here: [cert-verifier-js/ensureValidIssuingKey.ts at master · blockchain-certificates/cert-verifier-js · GitHub](https://github.com/blockchain-certificates/cert-verifier-js/blob/master/src/inspectors/ensureValidIssuingKey.ts#L18)

I’ll let you inspect your data against the use cases and hopefully you can figure it out. It should be quite straightforward.

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<div class="post-metadata">

### Author: ![mary.tellez](https://sea2.discourse-cdn.com/flex016/user_avatar/community.blockcerts.org/mary.tellez/32/856_2.png) [@mary.tellez](https://community.blockcerts.org/u/mary.tellez)
#### Post date: [July 13, 2022, 6:57pm UTC](https://community.blockcerts.org/t/wallet-verification-ethereum-testnet-error/3255/3 "2022-07-13T18:57:32Z")

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Thank you for your reply! 😃 I try in [https://www.blockcerts.org/](https://www.blockcerts.org/) and returns this:

 ![Screenshot 2022-07-13 at 14-55-45 Blockchain Credentials](https://us1.discourse-cdn.com/flex016/uploads/blockcerts/original/1X/c9dc42c4ace93cb6ec33f16457c9eda9d1e85c9e.png)  
This is why i don´t understand 😔

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<div class="post-metadata">

### Author: ![lemoustachiste](https://avatars.discourse-cdn.com/v4/letter/l/7c8e57/32.png) [@lemoustachiste](https://community.blockcerts.org/u/lemoustachiste)
#### Post date: [July 13, 2022, 8:04pm UTC](https://community.blockcerts.org/t/wallet-verification-ethereum-testnet-error/3255/4 "2022-07-13T20:04:30Z")

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Can you share the certificate?

Also, what browser do you use? That display is all over the place.

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<div class="post-metadata">

### Author: ![mary.tellez](https://sea2.discourse-cdn.com/flex016/user_avatar/community.blockcerts.org/mary.tellez/32/856_2.png) [@mary.tellez](https://community.blockcerts.org/u/mary.tellez)
#### Post date: [July 13, 2022, 8:41pm UTC](https://community.blockcerts.org/t/wallet-verification-ethereum-testnet-error/3255/5 "2022-07-13T20:41:56Z")

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> [@lemoustachiste](#):
>
> all

Hi, of course. This is my certificate:  
{  
“id”: “urn:uuid:b16de97f-d299-4b30-9437-bb34105c870f”,  
“type”: “Assertion”,  
“badge”: {  
“id”: “urn:uuid:82a4c9f2-3588-457b-80ea-da695571b8fc”,  
“name”: “Certificate of Accomplishment”,  
“type”: “BadgeClass”,  
“issuer”: {  
“id”: “[https://api.npoint.io/c8fb5e45050b173b4818](https://api.npoint.io/c8fb5e45050b173b4818)”,  
“url”: “[https://xpertopolis.com](https://xpertopolis.com)”,  
“name”: “Xpertopolis”,  
“type”: “Profile”,  
“email”: “[contact@issuer.org](mailto:contact@issuer.org)”,  
“revocationList”: “[https://api.npoint.io/9cc82b14fd88f4913823](https://api.npoint.io/9cc82b14fd88f4913823)”  
},  
“criteria”: {  
“narrative”: “Nibh iriure ei nam, modo ridens neglegentur mel eu. At his cibo mucius.”  
},  
“description”: “Lorem ipsum dolor sit amet, mei docendi concludaturque ad, cu nec partem graece. Est aperiam consetetur cu, expetenda moderatius neglegentur ei nam, suas dolor laudem eam an.”,  
“signatureLines”: [  
{  
“name”: “Your signature”,  
“type”: [  
“SignatureLine”,  
“Extension”  
],  
“jobTitle”: “University Issuer”  
}  
]  
},  
“@context”: [  
“[https://w3id.org/openbadges/v2](https://w3id.org/openbadges/v2)”,  
“[https://w3id.org/blockcerts/v2](https://w3id.org/blockcerts/v2)”,  
{  
“displayHtml”: {  
“@id”: “schema:description”  
}  
}  
],  
“issuedOn”: “2022-07-12T14:11:26Z”,  
“recipient”: {  
“type”: “email”,  
“hashed”: false,  
“identity”: “[mymail@gmail.com](mailto:mymail@gmail.com)”  
},  
“signature”: {  
“type”: [  
“MerkleProof2017”,  
“Extension”  
],  
“proof”: ,  
“anchors”: [  
{  
“type”: “ETHData”,  
“chain”: “ethereumRopsten”,  
“sourceId”: “0xc704276626d42cef745602977b4eab71a9b6c45e32709205c9d465ea2fd535e0”  
}  
],  
“merkleRoot”: “6995e50161578e1e8d04b6a290bc38a04ab9bebc4dd8304a4934680da583a972”,  
“targetHash”: “6995e50161578e1e8d04b6a290bc38a04ab9bebc4dd8304a4934680da583a972”  
},  
“displayHtml”: “\u003ch1\u003eHello World\u003c/h1\u003e”,  
“verification”: {  
“type”: [  
“MerkleProofVerification2017”,  
“Extension”  
],  
“publicKey”: “0xfFf65dd956FBa24B3087a5321042937704990cc8”  
},  
“recipientProfile”: {  
“name”: “Mary Tellez”,  
“type”: [  
“RecipientProfile”,  
“Extension”  
],  
“publicKey”: “ecdsa-koblitz-pubkey:16aYaTaXMeCX6KGwZS2FzdN4pPF1zZJBMJ”  
}  
}

I’m using mozilla firefox. Thanks.