The body has published its first guidelines on beneficiary gifts, where money is spent on a charitable activity or product.
Director of policy and campaigns Megan Pacey said such schemes have become increasingly popular over the past two years. But press reports have questioned the range in prices charged by different charities for similar gifts.
The variation occurs as one charity may use the money to buy a goat, but another may use it for vet costs and feed – or as a general fundraising tool.
The new guidelines say charities should be open from the outset about how donor money is spent.
They add: ‘This reduces the risk of any misunderstandings and of damaging the reputation of the sector as a whole.’