From https://www.dafont.com/telegrafico.font

PERSONAL USE
You can use it for free for personal use. Please give credit if you can (something like: font used is Telegrafico by ficod + a link to my deviantart or dafont page).

COMMERCIAL USE
If you're going to earn money for a project involving this font, I would consider correct to make a donation.
Imho a donation is not a payment, so you're free to donate as much as you want (be kind, please!).