If you have joint sponsorship and your partner pays tax then they can tick the Gift Aid box, provided that your donations are paid either from your partner’s account or from a jointly held or named account (i.e. the payment is from the ‘Gift Aider’).
Compassion UK Christian Child Development, registered charity in England and Wales (1077216) and Scotland (SC045059). A company limited by guarantee, Registered in England and Wales company number 03719092. Registered address: Compassion House, Barley Way, Fleet, Hampshire, GU51 2UT.