Originally Posted by
quaintass
Are you absolutley sure. I believe that you should "update" the ESTA form online each time you are planning to enter the US (by air). I believe that this has become more stringent of late. I base that on personal experience and that of a colleague who was being denied boarding at LHR on a flight to ORD until she updated online.
I may be wrong ( I remember I was once in 1973), but ......
No. Address info in the ESTA is optional. I can't be bothered filling it in for every trip (indeed sometimes I won't have computer access in between consecutive "visits" to USA) and have not had problems by leaving this blank. The address info in API is what matters and is compulsory to be entered before departure of your flight.