  We give recurrence relations for any family of generalized Appell polynomials
unifying so some known recurrences of many classical sequences of polynomials.
Our main tool to get our goal is the Riordan group. We use the product of
Riordan matrices to interpret some relationships between different families of
polynomials. Moreover using the Hadamard product of series we get a general
recurrence relation for the polynomial sequences associated to the so called
generalized umbral calculus.
