You, they, may have a good reason why it happened, but attempting to lie and deny it happened says even more about that person.

If he is able to get a co-signer and all checks out ok, can I/should I deny them the rental, even though I have the potential of having 6 parties responsible for the rent (3 tenants with 3 co-signers)?

How can anyone deny that globalization is real?

We had 1 mother/daughter/granddaughter apply, and the mother was the sweetest lady, clean slate, hard worker.. but her daughter (30), well recently on her I think 4th eviction last month, and quite possibly the worst history I've ever seen,  so we denied them- it was obvious this lady had no respect for anyone, and would likely soon be screwing over her own mom,  and her mom couldn't pass by herself so.... with your example, yes, we have decided against someone based on the entire application.     

I don't cater to pets so not sure what I would do except deny them for having a pet.

Out of all logic to approve me unsecured, but deny me secured...

I got denied, and wouldn't get a clear answer other than that they felt like my the properties were not worth it for them to lend on. 

They will send you a text with the items they picked up & you can approve/deny it. 

No person shall be denied their property rights without due process.

In this case the tenant has been able to stay in the unit for months while they decide if the landlord not sending like $1.38 in accrued interest to them on the lease anniversary is a legitimate reason to deny an eviction.These are very extreme examples of things but are the kind of BS we have to deal with around here...