We often hear this word, pronounced with an ending "d" as in affidavid.
There is no david in the affidavit.
The correct way to say affidavit is, to end with "t".
affidavit
ˌæ | f | ə | ˈd | eɪ | v | ə | t |
sat | few | son | do | say | van | son | tea |
Note : Secondary stress at æ. Primary stress at d.
Definition : written declaration made under oath; a written statement sworn to be true before someone legally authorized to administer an oath