The answer to the question how long will the Phone Verified Accounts (PVA-s) work depend on several factors: 1) the quality of PVA-s PVA-s must be made correctly, including: - made from unique IP, - using unique US land line numbers for verification, - giving correct user names, that contain real person names, - choosing passwords, that are completely random and untraceable for Craigslist 2) the posting technique and the quality of Ads - post the first ad to each Account during the first 12 hours after the creation of PVAs; - post an Ad every 48 hours; - clear private data (cookies) after every post; - change IP after every posting; - use only U.S. IP; - avoid to post identical ads; - it is highly recommend to post the second ad on the 3-rd day after the first post (48 to 72 hours after the first post). It is a combined responsibility of the supplier of PVA-s (the quality of Accounts) as well as the poster (posting rules) to ensure that the Accounts will work flawlessly for a long period of time. On the average the life duration of the Accounts should be at least 2 weeks, but nobody can guarantee it, as there are so many variables.