Hello. This is just to support what bramley said earlier.

As part of my day job I have to deal with taking people to court for non criminal cases. We were always sending the summons' out via Recorded Delivery (I am in the UK). We had a training session with a barrister who ran the local magistrates courts (Clerk of the Court) and he told us that if something was sent through ordinary post it was deemed to have been received, despite anything being said by the other party.

I hope this helps and am fascinated to know the story behind this thread. Best wishes.