Final answer:
A co-worker who wants to stop automatic application of credits to invoices should check their accounting software's settings or preferences and look for invoicing or credit management options to turn off the feature, possibly requiring administrative privileges.
Step-by-step explanation:
If a co-worker is experiencing issues with credits being automatically applied to invoices and wishes to turn off that setting, they typically need to adjust settings in their accounting software. While the exact steps can vary depending on the specific software being used, the general process involves navigating to the settings or preferences section of the program.
Once there, look for invoicing, payments, or credit management options where there may be a feature to disable automatic credit application. It's important to note that in some systems, changes to these settings might require administrative privileges. If the co-worker is not able to find or change the setting themselves, they may need to consult with the system administrator or the help documentation for their accounting software.