Find an atm near you, if it’s one that isn’t at your bank it might charge a fee. Depending on who you bank with there will likely be fee-free atms nearby. Go to the atm. If someone is already there using it wait in line for them to finish (stand about 5ft back). When it’s your turn put your debit card in the designated slot. It’ll ask for your pin and after that it will ask a series of questions. At the menu you can decide what you need. Common options are deposit (you can deposit cash and checks), fast withdrawal (usually like $40 and then bypasses other questions for efficiency), cash withdrawal (it’ll give you options somewhere between $20-200 to take out). Pick the one you want, follow the prompts (do you want a receipt, do you need anything else) and when you’re done it’ll spit your card back out along with a receipt if you ask for one. If you forget your card some atm’s will eat the card and destroy it More on reddit.com

I get 5's and 10's from the ATM all the time. It may just be dependent on the bank. If the machine can only physically hold a finite amount of bills, it will be able to hold a greater amount of money if it's all 20's. This means it would need to be refilled less often. On the flipside, not a lot of people want 50's or 100's, because they don't want to withdraw that much at once, and it's hard to get businesses to take large bills. Seems to me like 20 is the perfect happy medium. More on reddit.com

Gifs are great at getting quick to digest info, and /r/educationalgifs strives to give you educational info in this quick to digest format. From chemical processes, to how plants work, to how machines work, /r/educationalgifs will explain many processes in the quick to see format of gifs · ... More on reddit.com

to answer the question first: yes, some bank employee opens up the machine and fills in the notes. machine DO run out of money - there is an atm close to where i live that frequently runs out of 20 euro notes. its annoying. anyway - i live in ireland now. whenever i need 50 or 100 euro from the machine, it will always give me the money in 50 euro notes. that sucks. in germany, where i lived prior, there is a thing called "haushaltsmischung". translates to "household mix". so when you want 50 bucks out of an atm, it wont give you a 50 euro note, it will give you two 20's and a tenner, or one 20, 2 tens and 2 fives, something like that. which is why in ireland when i want cash, i only dispense 40 or 60 or 80, because that results in the money being dispensed in 20 euro notes. because i dont want to look like a fool for paying a pack of reeses with a 50 euro note. More on reddit.com