ramaelo Nepal -
Not sure if I understood your question, But I am assuming that your employee 'y' didn't help and you want to know what happens...
I wouldn't worry still...U don't want to think about it so much..focus on work and make sure you are doing extra hours (but don't put extra hours while submitting time sheets) and making everyone happy ....at the end as long as you do your job they don't care...
Now that doesn't mean its easy and NOT risky...
It all also depends on the company and the extend they go to do verification....I know bunch of people in my company, including me and it was easy...we just gave the same resume and provided 2-3 people as refernence. They will verify the degree thoroughly but for profeesinal refrence they just called few people that i had provided the name...
There is no way they can call each prvioues clinet and verfy ...
Just keep working and when time comes to worry (if any), worry at that time...just be confident ...You can make story...IN future if you need help... PM me...there are some many things you can tell ....