If you see a Muslim drinking while forgetting that he is fasting, should you remind him?

Question: Some people say that if you see a Muslim drinking or eating while forgetting during the day of Ramadan, you are not required to inform him, because Allah has fed him and given him drink, as mentioned in the hadith. Is this correct? Please give us a ruling, and may Allah reward you.

Answer: If one sees a Muslim drinking during the day of Ramadan, or eating, or consuming any of the other things that break the fast, whether out of forgetfulness or intentionally, it is obligatory to forbid him from doing so. This is because displaying such acts during the day of fasting is an evil, even if the person is excused in reality. This is so that people do not dare to display what Allah has forbidden of things that break the fast during the day of fasting under the claim of forgetfulness. If the one who displays it is truthful in his claim of forgetfulness, he owes no making up of the fast. This is based on the saying of the Prophet (peace and blessings be upon him): It is agreed upon that it is authentic.
Likewise, a traveler is not permitted to display the consumption of things that break the fast among residents who do not know his situation. Rather, he must conceal it so that he is not accused of consuming what Allah has forbidden him, and so that others do not dare to do the same.
Likewise, disbelievers are prevented from displaying eating and drinking and the like among Muslims, in order to block the door to leniency in this matter, and because they are prohibited from displaying the rituals of their false religion among Muslims. And Allah is the guarantor of success.