i got the same card, threw it away after reading this site.

This is the way they get around the do not call list. If you are telling them to return your call, it becomes a solicited call and you cant file a complaint.

I just bought a home in Manalapan, NJ and I've gotten that yellow card 5-7 times in the 4 months since my closing.  Its almost certainly a telemarketer with some sort of scheme.  It may be a legit company, but if anyone ever does pick up, Mr. or Mrs. Lewis won't be available, but their "associate" will gladly help you give over all your information.  Oh, and it will absolutely be "high pressure".  I worked for a couple places like this during college, we can smell our own.
My recommendation - just throw the cards away, any company that won't put their name on a mailer isn't worth anyone's time.

I also received one of these little yellow cards.
 
After doing a reverse look up of the address, it came up with several businesses at that location.

Here is the link with the name of those businesses if anyone is interested.  

http://www.whitepages.com/log_feature/listing_category/search/Replay/?search_id=61032110967251391164&view=&form_mode=&listing_category=!

Yes I received the same card, when I caled it went directly to Mrs. Lewis answering service. This is some way of trying to get someone to call and leave a detail message with your call back number. I left no message and if it was something important it would have been a detail letter

I received a yellow note in my mail with the following content: 68 south main street, Suite A Cranbury, NJ.

...recently you received a notice explaining that we have been unable to reach you by phone (never received any notice, and would appreciate a call.Please call within the next 3 days. Ask for Mr Lewis at (609) 616 7118....

Does anybody know what this is about?