PMI Audit
Whether your application gets audited is completely based on your luck. You cannot do anything to prevent the audit provided you haven’t made any obvious errors in your application. But there are certain good practices that you can follow before submitting your application that will help ensure that the audit goes through smoothly, should your application get selected for an audit.
The entire process along with best practices is explained in detail in the following post:
PMI Audit Process - A Step-by-Step Guide and FAQs
If you have further questions, post them as comments on the page linked above, and you should get a response within 24 hours.