system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When I send a monthly payment check to a major company, does someone from that company walk up to a teller at a bank with thousands of checks they must get a month or are they deposited a different way?
gpt
The address you most likely mailed that check to was a remittance processing operation associated with a major bank. It may have had a box number, zip+4, or similar on it for routing. 

Essentially, payments from hundreds of different companies come in to the same address and are sorted. The check processor has an assigned desk with any number of specific accounts. One account at a time, they pull the checks out, inspect them for various things (payee is correct, check is signed, etc) and key the data into a deposit batch. Once you run through all the checks the batch is sent for deposit. They used to deliver them to the bank hundreds of batches at a time, but most companies have gone to electronic processing so the checks never actually leave the original remittance center. Digital copies are sent to the bank and the client and the originals are shredded.