SAMJHO
"Apply to bill" FIFO hai — sabse purana khula bill pehle. Isliye implant ke advance se pehle koi purana cleaning bill khula ho to advance pehle wahan lagega.
CHECK
Visits → "Payments Received" me "Against" column batata hai receipt kis bill par laga.
FIX
void = archive (record rehta hai, us bill ka balance wapas badh jaata hai); din band ho to pehle Billing → Day End reopen; owner ne Action Guard me "Delete payment entry" par PIN lagaya ho to PIN. Void ke turant baad wahi amount sahi bill par record karo, warna patient ka diya paisa gayab dikhega (purani date chahiye to Back-dated Entry chalu ho to date chuno).
PREVENTION
advance lagane se pehle purane chhote bills ka paisa le lo, ya paisa lete waqt hi "Collect payment" me sirf implant wala bill tick karke darj karo.