In the sense of being "charitable", sure; but the legal sense of being "a charity" is quite a different matter. I record most of this as "sponsorship" and get

In the sense of being "charitable", sure; but the legal sense of being "a charity" is quite a different matter. I record most of this as "sponsorship" and get Tarsnap's logo put in various places; if the Canada Revenue Agency asks any questions I can absolutely point to evidence that this brings in customers to justify it as a business expense.