For You...
passport
single status affidavit stamped by a notary, translated into spanish by a certified translator & legalized by the dominican consulate (ottawa, toronto).
birth certificate (some hotels request this to be translated & legalized as well)
For your fiancee...
cedula
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if either of you have been married before you would need additional documents proving divorce/death etc also translated & legalized.
If you are getting married in a hotel you need to submit these early depending on the hotels requirements.
Cost to have the docs translated & legalized by the consulate is $140.00US per document.
This website outlines everything that you need. They charge the same as sending the docs direct to the consulate.
Dominican Wedding - All Wedding Services in the Dominican Republic from Toronto, Canada.
Sangria