mail is fantastic
You've Got Niff-Mail! - MoMoMomma - Fantastic Beasts and Where to Find Them (Movies) [Archive of Our Own]
An Archive of Our Own, a project of the Organization for Transformative Works
By Organization for Transformative Works

Chapters: 1/1
Fandom: Fantastic Beasts and Where to Find Them (Movies)
Rating: Teen And Up Audiences
Warnings: No Archive Warnings Apply
Relationships: Original Percival Graves/Newt Scamander
Characters: Original Percival Graves, Newt Scamander, Newt Scamander’s Niffler, Queenie Goldstein, Jacob Kowalski, Credence Barebone
Additional Tags: Romantic Fluff, Secret Admirer, Cunning Use of Niffler, Original Percival Graves is Bad at Feelings, Additional Warnings In Author’s Note

5 times someone left a note for Newt in Niffler’s pouch and 1 time he got the message in person