Anedot, Revv and WinRed allow you to customize the thank you emails and receipts to donors. Instructions on setting up and customizing receipts and thank you emails are outlined below:

1. Anedot – https://help.anedot.com/knowledge/edit-campaign-receipt
2. Revv – https://support.revv.co/en/articles/1511266-adding-substitution-variables-to-email-receipts
3. WinRed – https://support.winred.com/en/articles/3543717-customize-emails-to-donors