What is CR6 code mean on legal permanent resident card?

The CR6 code on a legal permanent resident card indicates that the cardholder is a conditional permanent resident based on a marriage to a U.S. citizen or permanent resident. This status is typically granted to individuals who have been married for less than two years at the time of their adjustment of status. Conditional residency requires the couple to jointly file a petition to remove conditions before the two-year mark. If successful, the condition is removed, and the individual can obtain a standard permanent resident card.