Q. My child collected money for a tzedaka through their school: – May I take the money and send in tzedaka vouchers that I once purchased and if so, must I give that money to tzedaka or may I spend it on other things?

A. Horav Shlomo Miller’s Shlit”a opinion is that you may offer the vouchers to the intended institution, since the vouchers are redeemable by the institution at their face value by their issuer. If the receiver cannot cash in the coupons at their face value, you might have to add the percentage necessary to compensate for the true redeemable value of the coupons. If they accept them you may keep for your own use the exchanged monies.

Please see prior answer, as it applies in this case too.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a