articial syndication and original content

Move on, unless you're talking about a huge authority site in your niche. I very seldom publish anything without adding it to my own site first.

I usually skip it and move on, myself.

If they want to acquire the initial indexation-rights for themselves, they're not really potential syndication partners for me, anyway.

It's true that you might, through correspondence, persuade a few of them to accept it anyway (and I admit I have, in the past, had previously published content re-published that way, even when they've said that), but my overall feeling is that the work and trouble involved in doing it just isn't worth it, in the long run, so I don't bother.

(By the way: call me pedantic, but you actually meant "unique" content, not "original" content, in your title. It's easier to refer to it as "previously published content" or "previously unpublished content": nobody can misunderstand what those terms mean! :p ).

The time that I'd spend writing something "unique" for them is time that I can far more valuably spend arranging further syndication for the articles I've already written and published.

It depends on how many eyeballs they can lead to my article.

If they are a high-traffic website, then no problem. If they are a low-volume website, I laugh and move on.

when a site says to you put original content then try to put only original content and then your content accept by site ,

hope you do as site say to you