Question about visa

Hi, I have to get a new visa – the visa de consanguinidad, and need to have the background check done. Does this have to be apostilled and which type of report do I ask for? From which website is it the CJS or FBI? Help me with a link or any experience that could help me figure it out?

Also when applying for the visa online which website do I go to where I can fill in the application?
Can I apply and complete the visa from the US or must I be in Ecuador? I’m thankful for any help.

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