used to love finding newspaper scrunched up in the vent, then when you remove it and say "i will just chuck this in the wheely bin" they say they will do it later , we both know fine well its going straight back in the vent when i leave, i ALWAYS mark on the CP1 "removed newspaper blocking vent and advised customer not to re block it", imagine the same newspaper going back in (which is dated, obviously) then 3 months after your service they did of CO poisoining, "we" check the vent and find a paper dated long before your service, how would you prove you had removed it, thats why i always mark it on cert that i have removed a blockage, so that if there is a future prob i have marked down removed and advised, i remember donks ago a QA pulling me for a blocked vent that i had missed, i knew i had checked it, so when we did a joint visit, the newspaper was still on the floor beside the vent, it was dated after my service visit, so the tenant had to admit they had blocked it after i had left, originally they had said i couldnt have checked it as they had not blocked it, muppets could have got me the sack, thats why i always write everything down, even if i rectify something, its good to have a record for the future