Abstract
Let R be a prime ring of characteristic different from 2, U the Utumi quotient ring of R with the extended centroid C and be a non-central multilinear polynomial over C. Suppose that F and G are two generalized derivations on R such that for all then we give the complete description of the mappings F and G.
Acknowledgment
The author would like to express their sincere thanks to the reviewers and referees for the constructive comments and suggestions which help to improve the quality of the paper.