I leave a note in the door slot that says:  "Make sure you keep paying...We know where you live.   

Just like slot machines.There is a senior, in particular that I am thinking of, in the building I live in.  

I just dump in a bunch of quarters in the slot, it works fine.

It seems like everyone living in Colorado is issued a dog, so I just expect that has taken the +1 slot so I do not add that in.

Also an allen slot on the bottom can unjam it.

They've been paying via check for the last 20 years and my dad had been traveling 90 minutes round trip to pick up the checks (multiple times per month since of course they would claim they dropped the rent through the drop slot and it must've gotten lost in the room). 

so it depends on the setting.. even at that taking no cash the front of their office was like a bank teller with bullit proof glass and a sliding slot door.. kind of like a low end convience market in the HOOD

Once I have a date set I call people and make "appointments" for half hour time slots. 

So we need to collect as many signatures as possible.Step 5: Turn in Petition PackageTurn in Petition Package that are signed and stapled in order, before October 7th, 2016 in the mail slot of the front door at Steve Summer’s Office “Glennco Inc” located at 129 W 23rd St, Independence, MO 64055.

I have 1 really good one, and one slot that I seem to turn over quite often.. haha I am actually getting ready to fire the one and hire another...