In a typical transaction, a third-party company acts as a broker between "sellers" (people with high-limit, long-aged credit cards) and "buyers" (people looking to improve their credit).
Usually, the buyer does not receive a physical card and cannot spend the seller's money; the card is sent to the primary cardholder’s address. The Benefits vs. The Risks buy authorized user accounts
Many issuers report the account’s history—including its age and credit limit—to the authorized user's credit report. In a typical transaction, a third-party company acts