Pos Ekspress does not require the receiver to sign off. Poslaju requires the receiver to sign off upon delivery.

This means that there is a higher chance that your receiver will say he/she did not receive the items because there is no proof of signing off upon delivery.
Courier attempting delivery means that your parcel is out of their office and the Poslaju ppl will attempt to deliver on that day.

I've not seen Delivery Process before. But if you have any doubts, just call up Poslaju to clarify.
Why you no want call poslaju?

Which number you called?

1-300 300 300 Hotline

Or call up their branch directly.

POSLAJU CHERAS
No 5 & 7, Jalan 12/91A
Taman Shamelin Perkasa
Batu 3 1/2 Cheras
Tel : 03- 9283 2459
Fax : 03-9284 1809

Or if you have the time, walk into their branch and fire them.