11th March 2015 From India, Lucknow
If the employee has left without informing and you want to contact him as a legal formality, you may also explore the option of searching him through newspapers notice. If he has left with company's assets, you can take help from police. If your only reason to conclude that, he has changed his address because speed post letter says so, still try to check by physical verification, by visiting the address.You may be for a surprise.
13th March 2015 From India, Mumbai