Employment documents to upload, they all look the same

[live4film]

In the section to upload documents for employment, there are 3 things that look the same.

Offer of Employment
Letter of Employment
Proof of Employment (includes paystub info, rate etc...)

All of these are kind of the same.

What are the main differences, especially between offer and letter?

 

[OldBoy31]

In the section to upload documents for employment, there are 3 things that look the same.

Offer of Employment
Letter of Employment
Proof of Employment (includes paystub info, rate etc...)

All of these are kind of the same.

What are the main differences, especially between offer and letter?

It's pretty self explanatory:
Offer of Employment > Also called Confirmation of Employment. This is the initial job offer letter which you receive before joining the company. example of offer letter
Letter of employment > Also known as reference or verification letter. Letter is issued when you are already working for the company. example
Proof of Employment> Now the above 2 letters can be easily forged. But you cant forge government issued docs like tax docs. Here you provide paystubs, T4 tax docs.