What is your threshold before complaining about unposted miles?
Realizing that a couple of hundred AA miles from a Millennium Hotel stay haven’t, and may not, hit my account, and realizing that I wasn’t going to trouble over it, I wondered what the general custom and practice was. As for me:
Fewer than five hundred, I ignore it.
Over a thousand, I’m all over it.
Between is situational, I’m faxing documentation if I particularly need the miles, or if I have some extra free time, or if I feel that the program in question is especially MCI-ish in their attempts to weasel.