Getting a visa to Spain

[tht]

If you are transferring to a flight right from where you land in Europe you do NOT go through customs and you are in a secure International terminal you only need the original Visa boarding a flight to your destination. NOT like the US...............

That's correct.

I don't believe that a Dominican changing planes at an airport in Spain needs a transit Visa.

Do I need a visa if I am only transiting?

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Need required entry docs for the final destination wherever / whatever that is. Example.. checking in to London via Madrid with no UK visa you may get stuck at SDQ.