Absolutely have them complete a full application form. 

I told them to remove the charge and removed the service from my account.

I usually treat couples as one application.

For SFH or duplex, most of them usually charge a flat rate ($100 - $150 per month).

Then submit preliminary plat application.  

With email, you can attach a signed waiver from the applicant allowing the landlord to release the data.

(We built the same plan within 2-3 blocks of each other so often we address similar issues that come up.)They now charge a $200 non-refundable application fee.  

Quote from @Ty Loney: Curious if this would still be applicable with todays rates Yes, there is still a lot of seller financing going on: https://noteinvestor.com/notes-101/seller-financing-2022/ (not sure if sharing links is allowed, but it's not my website)

The downside I noticed on the "Reventure" application, the market appreciation remains flat or in the negatives.

I have also noticed an uptick in our investment home equity loans and HELOC applications, this can be a good options for scaling as well.