Is the recipient address handwritten?

Windowless Letters, Notecards, and Giftcards

The recipient and return address for Windowless Letters, Notecards, and Giftcards are handwritten.  The font use is described here:

https://help.thanks.io/handwriting-style-for-envelopes

Postcards and Windowed Letters 

Postcards and Windowed Letters do not use a handwritten font.