Refused the letter

I sent a COBRA letter by certified mail and the ex-employee refused it at the post office. I documented this, kept the envelope with the 'refused' on it and sent the letter by regular mail with an acknowledgement from the post office that I sent a letter to the person. Has anyone ever had an employee refuse the letter and if so what was your process? I really can't prove that he received the letter, but at least I showed a good faith effort, do you think this is enough?
Comments
GENO
PORK
After that, I began sending them regular mail.
Linda
Best way, they recommend, is to send it via certificate of mailing. This way you have the proof that it was mailed but nothing that proves whether they received it or not so in the eyes of a court, you have met your obligation.
In answer to the initial question, I think that you having received the verification that they did not receive it your best defense is to send another notification via cerficate of mailing. That way, should there ever be a question, you have the initial notice showing they refused the certified letter and the 2nd set of documentation showing that you tried again. Maybe I'm going overboard but I think this route would prove that you met your obligation.