in response to an advertisement looking for food supplier in a restaurant in Putrajaya, Lana wrote a letter to Don, the restaurant owner, proposing to supply him rice in a certain amount for one full year.She sent the letter on June 1,2009.On 4 June 2009, Don received the letter and sent an acceptance letter the next day. After three days he wanted to change his mind and came to see you to ask whether the contract has been conclude and whether he still can revoke his acceptance.Advise Don.
Given that Putrajaya is in Malaysia, Malaysian law would apply. If I were to be cynical, I may suggest that whoever is best connected would win.
I vaguely recall under UK law that an acceptance is binding when it is posted, but don't rely on my failing memory for your homework as you may end up a street sweeper