Protect backend from multiple form submits in Laravel

I'm trying to protect my backend from multiple post requests to avoid duplicate data on database and the server overload.

I've already blocked the frontend disabling the submit button after a first click, but it will not prevent some "smart user" to submit my form from console or disable javascript from page and try something.

So I want to know if Laravel has some solution for this case.

PS: I've already tried some solutions on backend too, if you want I can post here.

via Chebli Mohamed