Many people who donate to charity do so relatively privately. However, giving publicly has the potential to encourage others to give more to charity themselves, and to affect which charities they give to. These considerations have encouraged many members of the effective altruism community to try to be more public about their donations.
Hurford, Peter. 2014. To inspire people to give, be public about your giving.
An article in favor of being public about donations, to encourage others to donate.
Kaufman, Jeff. 2016. Donation report.
An example of a member of the effective altruism community being public about his donations.