Questions and discussion about AGL's Energy plans and your AGL Energy account
'Debit adjustments' and 'Credit adjustments' are applied for a variety of reasons, though the most common reason is an overcharge or undercharge on your previous bill that has been identified after the fact, possibly due to an estimated reading.
If you want to find out why this was applied to your account in particular, you'll need to get in touch with customer service. Log in to My Account and click "message us" to get started.