For example, suppose you have 10 "identical" properties.

If the units are identical then 50% of the sales price would be allocated to primary residence and 50% to investment. 

Meaning the duplex I got for $40k, its identical neighbor sold for $79k, 2 weeks ago. 

I know where they live so why should they not know where I live.I have been on internet forums for 15+ years and have tried to never provided any accurate information that would give away my identity.

Could be related to misreported accounts, credit report errors, identity theft, divorce that included joint accounts, or even legitimate accounts that had been settled or could be paid off quickly.We've had terrific long term tenants who messed up their credit history and were forced to become long-term renters since they would never qualify for a home mortgage. 

Once the economic bookkeeping has been done, the allocation of tax results among the partners must be made in a manner that is consistent with the allocation of the corresponding economic results.For example, assume a partnership has two equal partners with identical economic capital accounts.

It verifies identity, checks rental/employment history so I can cross-check what they've provided on the application, gives me a complete credit report and score, and lists any criminal history.Some people charge higher, like $40 per and spend only $20 on the background check.

They're both concerned about identity theft.

You should have done it long ago.Do you have any idea how many landlords end up losing 2,3,6 months rent in identical situations as you are in due to their inaction.Act first, ask questions later.

Is there a reason you are protecting their identity?