Duplicate content is always an issue where your website’s SEO is concerned. There was a belief till now that a business having the same site on different country specific TLDs might get involved in duplicate content issues.
But here is the breather. Google and Yahoo have confirmed that they treat the content for same site with different TLDs differently. These sites are not considered as copies of each other but are understood as the same site with geo targeting domains.
So you do not need to worry about duplicate content issues for TLDs. Nevertheless, it is always a good practice to have content targeted towards the geo location target audiences of your site.
This makes it more compatible to the target visitors and helps in improving your conversions. But one thing is for sure now. You do not need worry about duplicate content issues with different TLDs any longer.