I don't speak Spanish, so it's hard for me to know what a fotocopia compulsada is. But :
- copie conforme = an exact copy, I-e a photocopy. In French you can also say "une photocopie"
- copie certifiée = exact copy with a stamp proving it's true to the original.
- copie notariée = exact copy with a stamp from a notary/lawyer proving it's true to the original.