TAX Saving | Fuel Reimbursement

Why would he be fired for auditing tax returns? How would his employer come to know that he received a notice? You are over exaggerating. I deal with tax notices and I have a CA in my team too.

The company takes any fraud seriously hence people were fired, one for fake HRA another for fake reimbursement claims.

Your LTA/HRA/Fuel expense is reimbursed by the company and it shows up in your form 16. When your return is picked up by the Income Tax Department they ask your employer/their auditors to submit the proof for your claims and hence they will get to know about it.

https://economictimes.indiatimes.com/wealth/tax/submitting-fake-bills-to-lower-your-tax-liability-tax-department-has-ways-to-catch-you/articleshow/63375589.cms

In another instance there was a fake reimbursement claim that was caught because the company's auditors/some employee in the finance department did a spot check calling the vendor and it was found fake.

I know at least two different instances of people being let go due to fraud claims on HRA/fake invoices etc. in two different companies where I worked. Hence this is not the right advice to OP.