not sure about submision

I want to submit a site but i'm not sure if it was submitted before.I'm afraid that my submission will fail the previous one (if it was).
Thank you!

The only way to know for sure is request a status update, but in order for it to work we would need the category it was submitted. Obviously if you do not know if it was suggested for inclusion you won't know the category either.

My suggestion would be to submit (or resubmit we don't know which) to the single best category you think it should belong to. One resubmission will not be penalized as spam, it will however replace any existing listings you may have forgotten or were unaware of.

Hope that helps.