The Use and occupancy process in philly is simply ordering a certificate online.

In ca there is the balcony and stairwell inspection (sb721) that is to be completed by year end (I have not done mine and have asked 3 architects and 1 GC if they have necessary certifications to do it and none of them had the state required qualifications - but I have not tried that hard, I contacted existing contacts).  

If it was your PM then they should have gotten an insurance certificate from the pool contractor and should contact their insurance company.If you hired them then you should have gotten an insurance certificate prior.

So, maybe you sell a $50 massage gift certificate for $45 but pay the massage business $40 for it and make $5 in the middle.

Only two options unless owner wants to do Cash-for-Keys. 3) Certificate of Compliance: why wasn't this starte last year?

Would appreciate anyone's experience with buying Lien Certificates and Deeds.

There is no certification that states “you’re ready for RE Investing”.

This means having appropriate insurance, executing contracts with vendors/subcontractors and ensuring you are listed as an additional insured (not just  a certificate holder) on their insurance policies.

You will need to buy the tax certificate at the tax lien sale.

Was this a tax lien certificate or a tax deed?