Assalamu alaikum In your Fatwa ID 8036. Their is a note: You should walk a little or lie for some time after urination, then make wudhu. Please, clear about passing of some drop is it necessary to change underwear?
Answer:
(Fatwa: 2314/1904=B/1429)
In the abovementioned case, it is necessary to change underwear due to drops. Yes, if anyone is mazoor then the ruling is different.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband