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Hi, I'll submit my website to several Directory websites in order to do SEO.

And Japan's Directory websites should insert one's own links(for example, <a href="www.example">Free Directory submit</a>) into the Widget or Footer.

If I won't add it, I can't be registered on the Directory.

Inserting my websites' Footer or Widget when people visit my websites, can I hide the links?

I used "DIsplay:none" but it didn't recognize and register in the Directory site. What's should I do? Please help me.

cloak the site for the directory based on referer i.e. collect the domains of the directories and show them a page with the link in the footer. then you can also hide the link from the visitors and more importantly SE bots like google.