  This paper is committed to establishing the assumptions essential for the
existence and uniqueness results of a fractional functional integrodifferential
equation (FFIDE) having a derivative of generalized Hilfer type. Using the
Picard operator method, and Banach fixed point theorem, we obtain the existence
and uniqueness solution to the proposed problem. Along with this, the
Ulam-Hyers Mittag-Leffler (UHML) stability is discussed via Pachpatte's
inequality. For supporting our results, an illustrative example will be
introduced.
