Guys having a doubt.I sent materials to LSAC on 6th of this month and it takes about 3 days to reach LSAC.So when the material reaches LSAC,do they send out any receipt sms or mail?Or do they send intimation only on evaluation? Little stressed over this.

Also has this situation happened before?

They never notified me when they received my undergrad transcript in the mail when I was applying for law schools in 2012, my application information just changed from one day to the other, so once it's in your file it should be reflected in your profile, especially if what you sent them is mandatory stuff like a transcript. If they didn't receive it, chances are your applications will be incomplete and they won't go out of their way to do something about it, so if you're starting to get stressed contacting them to check on the status of your mail would be the best.

Also keep in mind that for things that have to be changed manually in websites it may takes an extra day or two until the changes are reflected on the website.