Is it obligatory to give in charity the value of a stolen item that was purchased with knowledge, given that its value in local currency has changed between the time of purchase and now, while its value in foreign currency has not changed? Is the considered value that at the time of purchase or the current value?

Whoever purchases a stolen item is not permitted to benefit from it. It is obligatory to return it to the person from whom it was stolen, if that person is known. Otherwise, one should give it away in charity on their behalf. If the item is no longer available, its value should be given in charity. If it is impossible to identify the owner of the money, it should be spent on the welfare of Muslims, according to the majority of scholars, and this is the correct view. Therefore, if the stolen item is still in existence, it should be given in charity on behalf of its owner. If its value has decreased, then the amount of the decrease should also be given in charity. If the item is not present, then its value on the day it was lost should be given in charity, using the currency equivalent to the item. You may seek recourse from the seller and demand the price back, as the sale of a stolen item is invalid.