Expedia Group verifies all reviews to ensure that the customer has indeed booked on our site. To encourage customers to submit their reviews, we send an email containing a link to evaluate the hotel to which we sometimes attach a reduction or Expedia Rewards voucher to use on a future trip. We post all reviews whether they are positive or negative, to the extent that they respect our content directives. This monitoring is automated. Any rejection is manually checked and, if maintained, notified to the reviewer by email with reasons. We do not otherwise process changes, nor reviewer contact. We de-list reviews after 4 years, other than for properties that have a non-significant number of reviews.