@Cleon kailangan mo lng dalhin passport & 2 passport size photo. Punta ka window 1, hingi ka lang ng form. Fill-up mo, then i-escort k nung attache nila for finger printing. After, you have 2 options, mail mo sa NBI or paasikaso mo sa kamag-anak mo, preferred yung 2nd method. Dadalhin sa main branch ( sa taft)yung form, may separate na pila nman for OFW, yung sakin, they ask us na bumalik the week after para kunin yung clearance.
Kahit Sunday ka pmnta sa embassy, wala pila halos for NBI clearance. Hope this helps.