My certified letter was not delivered to the office I sent it to, because it was closed the next day; however, it was open all day the next day after, but they still did not deliver it as they said is the policy. Tracking on the website is very difficult, but I did get an answer and using the phone number - voicemail is a total nightmare. Clicking tracking numbers or saying the numbers - does not work! There is no excuse for this kind of customer service. Three days later and the letter was still not delivered!