This will go under the "duh" category, but please do not post reviews of vendors if you have not used them or visited the property.
Obviously if you booked a vendor, great but this does not warrant a review. If you have not received your images or had your wedding or done a site visit or visited the resort you are not really in the position to write a review.
It is not helpful to write reviews and give vendors 5 star ratings if you have not completed using their services. Contacting a vendor and having them return your call does not constitute a 5 star review.
These reviews will be removed and since you are only allowed to write 1 review per vendor you will not have a chance to review them once you have completed their services.