I am a mortgage broker, can i pay my affiliates 50% comission as 1099? There is business affiliate arrangement

There is a business affiliate arrangement out there as long as you disclose to your client that affiliate is geting paid.

Yes. If the commissions were paid you should send them a 1099.

Good question.

If you actually pay your affiliate 50%, then you would issue a 1099. You don't simply declare it, you pay it.

So if that's what your records and bank accounts reflect, then I think you are good.