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title NuGet Warning NU3020
description NU3020 Warning code
author mishra14
ms.author jodou
ms.date 8/16/2018
ms.topic reference
ms.reviewer anangaur
f1_keywords
NU3020

NuGet Warning NU3020

Scenario 1

Package 'SamplePackage v1.0.0' from source 'https://contoso.com/index.json': The timestamp does not have a signing certificate.

Issue

The timestamp on the package signature does not contain a signing certificate.

Solution

Please try to re-sign and timestamp the package. If the problem persists, contact the Timestamp Authority to discover the source of the problem.

Scenario 2

Package 'SamplePackage v1.0.0' from source 'https://contoso.com/index.json': The primary signature's timestamp does not have a signing certificate.

Issue

The timestamp on the package signature does not contain a signing certificate.

Solution

Please request the package author to re-sign the package using the nuget sign command as described in NuGet docs. If the problem persists, request the package author to contact the Timestamp Authority to discover the source of the problem.

Note

When running the nuget verify -signatures command, NU3020 is raised as an error. Otherwise, NU3020 is raised as a warning.