Airlines
LH M&M: about 90% post automatically. Email with scanned bills works to get missing points.
SQ KF: about 95% post automatically. Unfortunately letter (to Singapore) necessary to claim miles.
KL FD: 100%
Hotels
MRT: about 90% post automatically. Email with scanned bills works to get missing points.
SPG: 100% post automatically: 95% of these with correct points. Unfortunately letter (to US) necessary to claim incorrect miles.
SRS: (Steigenberger) 100% post automatically.