The Honest Duck, Issue 5

January 2022

Hello and a happy new year to everyone! We hope you enjoyed the holiday season and that you and yours are doing well. 

Here’s a summary of what’s new with Kill Bill:

  • A documentation design refresh
  • Additional documentation guides
  • More Kaui tutorial videos
  • Latest Kill Bill software release
  • Our holiday video (in case you missed it)

A Documentation Design Refresh

Our documentation ( now has a new design. We put in quite a bit of time and work updating the look and feel.


new Kill Bill documentation interface

Here’s a summary of the main features:

  •  A  – Click the Kill Bill logo to return to
  •  B  – Collapse/expand list of documents
  •  C  – Search bar
  •  D  – Navigate open document with Table of Contents

We’ve also included an email link in the lower-left corner ( E ) in case you spot any problems:


Report a Kill Bill documentation problem

That Java Vulnerability That Freaked Out the Internet

Thankfully, Kill Bill is not affected by the log4j vulnerability revealed in December 2021. Kill Bill relies on slf4j and logback as an implementation (and not log4j).

When news like this occurs, we notify our GitHub sponsors right away on a dedicated Slack channel.

We’ll also post on the Kill Bill Community (mailing list).

Want to be notified when we release this? Let us know by replying to this email!

More Documentation

As highlighted a few months ago in a blog post, our doc team has added several guides to

We’ve also updated the Overdue System Guide.

More Tutorial Videos

Kaui is excellent for testing and all sorts of administrative back-office tasks. The Kaui tutorials are great for onboarding new employees whose responsibilities fall within the billing realm.

Here are our latest ones:

How to Apply Transactions to Payment Methods—Applying various transactions, such as authorize, capture, or refund, directly against a payment method, such as a credit card. Note that this process is different from paying an invoice (below).

How to Make a Payment on an Invoice—Kill Bill automatically pays invoices if the customer account has a valid default payment method. However, in certain conditions, this default behavior is disabled. This video shows you how to pay an invoice manually.

How to Write Off or Void an Invoice—Writing off an invoice is different from voiding an invoice. Learn the difference and how to perform each process.

Latest Kill Bill Release: 0.22.28

The latest release of Kill Bill is 0.22.28, and you can see the details in the GitHub release notes.

Wondering About Upgrading Kill Bill?

Day after day, it’s easy to get caught up in other tasks. Before you know it, you’re hopelessly out of sync with the current Kill Bill release.

If you’d like to know how your organization would be affected by updating to the latest Kill Bill version, you can reserve a block of our time. We’ll review your current configuration and integrations and let you know of any potential blockers. We’ll also provide an update roadmap to follow.

This way, you’ll know in advance what’s involved and can set aside enough time to get your billing and payments software up-to-date.

Let’s stay in touch…

To keep up with our Kill Bill activities, check us out on  LinkedInTwitter, and Community.If you have a topic you’d like to see covered in the newsletter or blog, please let us know!


Pierre and Stéphane