The assumption that he has already paid Zakat by only removing some of his/her wealth by doing certain things such as making a feast, donating or giving some charity.
This is wrong…
Usually, all these are made just by coincidence and neither are based on nisab nor the rate (2.5%) according to what it is required to perform zakat. This may be because of his/her ignorance and no one around him/her make a reminder.
*Zakat should be paid based on nisab, and the amount of zakat need to be pay is 2.5% of the total wealth required for zakat.
Does this ever happen around you? What do you think?