Is there a tool that ensures e-commerce businesses could prevent fraud in promotions/offers?

E-commerce brands tend to make the most of the festive season with offers, promotions and other discounts. This could open up a totally new market for the brand. Illegitimate users would also be on the lookout for such offers to exploit them and cause losses for the business. If we could ensure that these offers are tokenised and custom made for each user ensuring only one usage per IP for example, then this could make more sense. I would love to hear your thoughts on this!