At this point I have collected a rental application from him to start to writing the amendment.Here is what they are adding to the lease: He will be full time living there.

The easiest way to do this is to have you complete a loan application for me.

My wife also asked them to send a formal application form but they never did.First Question: What would you do under this situation?

It's more expensive and Jerry is absolutely correct that the applicable jurisdiction is where the property is located, in all cases dealing in real estate.A good way for you to look foolish is to imply Jerry W. doesn't know what he's talking about, at least that's the way I took your last statement.

@Lucas Hall I made a account but I'm trying to make a application where a link is in the house listing and they go to it to fill out questions.

They already gave 1 month rent with the application.

When a tenant is interested in filling out a application you will get their email and plug it in to your account.  

Doing some research, in my state at least, the licenses & liability insurance for pest control actually seem to be really, really low.We carry a $3m+ umbrella policy + $1m per property, it may make sense to get a pest applicator license and the like if we see more bedbug issues.

Bryan C.research the Applicable Federal Rate (APR) 

I would take your emotions out of it and explain that she has a choice; she either pays the late fee and all is good, or she doesn't pay it, assuming your lease is written this way, she will be considered behind on rent for the month, late charges will due for the next month, and so on, and at some point you will file an eviction for unpaid rent, and once eviction paperwork is filed with the county, other landlords will see that when they screen and most likely deny her rental application.