She has been fasting to make up days from Ramadan without forming the intention the night before, and she used to form the intention in the morning. What must she do now?

Fasting Six Days of Shawwal before Making up Missed Fasts?

It is not valid to combine making up missed Ramadan fasts with fasting six days of Shawwal with one intention

Can You Fast the Day after `Eid Al-Fitr?

She did not fast because she was pregnant and breast-feeding, and she did not make up the missed fasts until she got old and became unable to make them up, then she died. Can fasts be done on her behalf?

She fasts on Mondays and Thursdays with the intention that if she owes any outstanding Ramadan fasts then these are to make up for them, otherwise they are naafil fasts

He thought that his fast had been spoiled, but he refrained from eating out of respect for the sanctity of the month, then it became clear that it had not been spoiled; does he have to make up that day?

She is not sure whether she formed the intention to make up a missed Ramadan fast before dawn or not, so she changed her intention to observing a voluntary fast

She did not fast because she was unaware that fasting was obligatory for her; does she have to make up the fasts?

If there is an error in the moon sighting, and it is proven that we did not fast on one day of Ramadan, do we have to make it up?