Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
disclaimer [dɪsˈkleɪmər] n отка́з от отве́тственности
to issue a disclaimer обнаро́довать (perf) отка́з or отрече́ние от отве́тственности
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.