should parents apply social security card after receving greenca

My parents have TIN number for tax returns.Do they need social security numbers after they got their green card?

They do not need go to work in US since they already over 70 years old.

What's the benefit if they have the SSN?

 

Thanks in advance

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• 回複：should parents apply social security card after receving gree -863211- ♂ (434 bytes) () 02/18/2013 postreply 15:12:33

• 回複：回複：should parents apply social security card after receving g -mini_ok- ♀ (14 bytes) () 02/18/2013 postreply 20:01:21