Q. Can one comply with the mitzva of Matonos Loevyonim (giving to the poor) during Purim when the receiving pauper uses a mobile credit card reader terminal and one offers to him a credit card that will be charged immediately?
A. Horav Shlomo Miller’s Shlit’a opinion is that it is likely that the indigent is using a Tzedaka Organization to help him receive the monies given to him and is thus able to grant a tax deductible receipt. If that organization, keeping with the Halacha needs of Purim, immediately transfers the monies to his account on Purim itself, the donor will comply with Matanos Laevyonim. However, the above condition should be verified.
Rabbi A, Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit”a