What is a tie-in agreement?

A tie-in agreement is best defined as an arrangement where the purchase of one product is contingent upon the purchase of another product. This type of agreement is commonly seen in various industries where sellers may require customers to buy a secondary item or service as a condition for acquiring the primary item they desire. This practice is often scrutinized under antitrust laws, as it can limit consumer choice and create unfair market conditions.

In contrast, the other options address different types of agreements or legal documents. While buying multiple properties simultaneously describes a broader real estate transaction, property share arrangements pertain to shared ownership structures that do not inherently involve the same aspect of contingent sales. Additionally, consumer protection laws generally focus on regulating fair selling practices rather than defining specific contractual arrangements like a tie-in agreement.