Find one that is a member of the International Council of Shopping Centers, whom all of those national tenants are a part of and are in the database. 

LA City here~~Take the certificate of occupancy to the post office and they will register your ADA address in to their database and will deliver mail to your ADU.

We’ve got a database of 50,000 potential buyers nationwide, so if you come across anything interesting, add me to your list—I’d love to chat about how we can make something happen.

Now that I think about it, ALL industry has Guru's, "Proprietary Database" etc..B.

We built out our own portal and accounting database for that functionality because we were not finding good software that could handle a higher volume of receipts AND tie it in with the rental property accounting. 

Some of them are rockstars and have a drive in their job, those few that I know have provided me their database of open vouchers that need to be fulfilled and they are having a hard time.

So, we obtaina full credit report and review collections, chargeoffs, age of credit accounts, active accounts, etc.to build an overall credit evaluation.FICO ScorePct of PopulationDefault Probability800 or more13.00%1.00%750-79927.00%1.00%700-74918.00%4.40%650-69915.00%8.90%600-64912.00%15.80%550-5998.00%22.50%500-5495.00%28.40%Less than 4992.00%41.00%Source: Fair Isaac CompanyPublic RecordsWe also obtain data from national databases about evictions, convictions and sex-offender histories.

Perhaps an option to only search topic lines versus searching the entire forum database would prove helpful.#5 is sort of the reverse of #4.

What database? 

Most of the good skip trace sites want you to have a "permissible purpose" for you to access their databases.