The older person wants to make a donation - what do I say?

Reiterate that there is no fee for a mission and that you are volunteers. State that making a donation will not affect the help they can receive from GoodGym in any way but that if they still want to, they can make a donation by cheque payable to GoodGym and sending to GoodGym, Somerset House, Strand, London, WC2R 1LA. The can also donate by credit card, debit card or paypal online.