2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/100995The note is devoted to estimates for convolutions appearing in some class of stochastic Volterra equations. Two maximal inequalities and exponential tail estimate are proved by the fractional method of infinite dimensional stochastic calculus. The paper extends on non-semigroup case some results obtained earlier for semigroups.9 pages, shortened and improved version, Journal ref. addedProbabilityMathematical Physics60H20; 45D05; 60H05text