esa and pensions

hi again,
thanks for answering a couple of questions i have posted today, i did post on a thread about pensions and benefits, which i don't think mentioned my query, anyway since 2014 i have been receiving a pension, i informed the dwp at the time, if i remember correctly the following year they sent me a letter about any increases in payments to my pension, i answered it and i seem to recall giving them permission to contact my pension provider each year, they have not written to me regarding my occupational pension since, so is it safe to leave it, or should i contact anybody about it, thanks again, by the way i am get esa support group contribution payments and pip, thanks again in advance