It is impossible for you to continue to work life smoothly without any sort of problems. Some people might have to deal with huge issues, whiles others might have smaller problems like issues with co-workers, and other such small, trivial matters. However, if you happen to have issues with someone in the workplace, then you will have to go through a formal process in order to make sure that your concern is heard by your manager or other high ups, and for that, you will have to fill in a write up form.
When it comes to filling in employee write-ups, employees themselves can do it in case they happen to have issues or complaints regarding a co-worker or manager that they want the company to acknowledge and address. This is a formal procedure, and you want to make sure that you follow a proper template and format when it comes to writing employee write-ups.
Now, apart from employees, the managers and/or supervisors can also write employee write-ups in cases where they happen to have issues with a certain employee, and these write-ups can be regarding a number of matters ranging from employee behavior, disobedience, punctuality, job performance, to address any property damage caused by the employee and so on. This way the supervisor or manager is able to make sure that the employees are being made aware of their mistakes and that your concerns or warnings are being communicated to them in a proper and formal way. This process prevents you from having to come face-to-face with the person that you have a problem with, and it allows you to communicate the problem to them in a more professional and non-personal manner, which happens to be something that needs to be upheld in a work setting.