In Donor Perfect, there was an easy 3-step function for sending out weekly gift receipts/acknowledgements. You clicked on Receipts, chose which type of receipts to send (email, letter, annual consolidated letter). I could export it to Excel Word, or generate receipts automatically. Once complete, I simply updated the batch number so that when I went to pull receipts the next week, it picked up where I left off with the newest gift. Extremely efficient and time-saving, and an absolute necessity for how we function. I am very sad that there is not wholly comparable feature in RE to do this.