Question about Venmo...

If this isn’t in the right group, I apologize in advance. This person owes me money and I’m not really sure if they’re going to pay it back or not. They paid me a very small amount on Venmo a few days ago but said they’d pay more today. If I request money through Venmo, what does that look like on their end? Can they deny the request, accept it? How will I know what is going on? I tried googling it and looking at the FAQ’s but i wasn’t able to find my answer. I can only find how to pay and request money. But I want to know what it looks like on the receiving end of the request and how it works.

Thanks.