If you are looking to boost your credit score with seasoned tradelines, you've come to the right place.

Seasoned tradelines are lines of credit, typically credit cards, that are well established, have been opened and remain in good standing for an extended period of time usually for and at least two years.  

The “seasoned” part simply implies that the tradeline has history. 

It should be safely assumed that when you are buying tradelines for the purpose of boosting your credit score, that the seasoned tradeline is actually seasoned; that it actually has a positive history of on time payments.