After or during the claiming Google Authorship when you check your blog (hosted with Blogger) with Rich snippet testing tool mostly you get two common warning and error messages Warning: Missing required field updated. and Warning: Missing required hCard author. Is there any need to correct or fix these markup warnings and errors? Yes, it is. Then how to fix these markup warnings and errors? There are two ways to fix these markup to get better search engine presence with Google Authorship program because participation in this must increase you click-through rate (CTR). This post will guide you how resolve authorship markup warnings and errors for Blogger hosted blogs. One of the method plays with Blogger template tags hentry and hfeed and in another method you’ll need to replace link class timestamp-link with updated and abbreviation (abbr) class published with updated. You should stick with one of the following method because there is no need to use both fixes.

Notice: You must take backup of your Blogger template before making any changes. Please read instruction in this post.
Instruction to take backup of Blogger template

Fix Authorship Markup Warnings

Note: Before making any changes to the template please take the backup. Link given below will help you.
Learn how to edit Blogger template?

First Method:
Here we look for first method to correct Authorship markup warnings and error in Blogger template

1. Go to Blogger Dashboard › Select Blog › Click on Template › Proceed › Edit HTML
2. Search for hfeed and hentry one by one and rename all instances those exist in template with h-feed and h-entry respectively.
3. Save template and now check for authorship markup warnings and errors with Rich Snippet testing tool.

You’ll get a smile on your face because no markup warnings and errors will be shown.

Second Method:
Now we move to second method which is slightly difficult from first one.

1. Go to Blogger Dashboard › Select Blog › Click on Template › Proceed › Edit HTML
2. Now you have to search one of the following codes or similar that might be little different from these.
Code I.

<a class='timestamp-link' expr:href='data:post.url' rel='bookmark' title='permanent link'><abbr class='published' expr:title='data:post.timestampISO8601'><data:post.timestamp/></abbr></a>

Code II.

<a class='timestamp-link' expr:href='data:post.url' itemprop='url' rel='bookmark' title='permanent link'><abbr class='published' expr:title='data:post.timestampISO8601' itemprop='datePublished'><data:post.timestamp/></abbr></a>

3. Now concentrate on the highlighted parts timestamp-link and published. You have to change these values with updated for all instances present in your Blogger template.
4. After successful completion of entire task please save the changes made in Blogger template and now check for Authorship markup warnings and errors with Rich Snippet testing tool.

You’ll get a smile on your face because no warnings and errors will be detected.