Dear friend,
It is very very clear that he is not interested in his job or your company. He might have had another offer. Having worked for ONE DAY what an employee expects? The principles of natural justice, and opportunity to be heard,etc. are to be considered only when someone puts in a considerble no.of years of service in an organization. In this case, we are not violating any law. A person before joining, made effort to go to company's website and tried to understand the company's background, etc., can't he have courtesy to inform the auhtories that because of such and such reason he could not turn up for duty? Does he not have phone no. of the company? If this is what the attitude he exhibites, that too the very next day of having joined the company, what kind of commitment you can expect from from?
You know something. There are a lot of people suddenly disappear without any information, and work in some other oraganization with an offer. They work for 10 - 15 days or so and if they like the job, they stay back, and if they don't, come back saying that they had jaundice, one of their close relatives died, they met with accident, etc. and bring one (false) doctor's certificate. What do you say for this attitude? Establishing their claim whether it is genuine or not is different issue.
In your case, you do not have to initiate any letter to be sent to him. Just keep quite. Don't even load his data onto the payroll master for processing salary. Don't even consider him as an employee. if at all he turns up later, depending on the merits of the case, you can decide to have him (as new joinee) or otherwise.
I am not for this attitude.
V. Balaji