Neighboring condo owners not paying their dues

[Eran S.]

Hello fellow home owners,

I recently bought a condo in Philadelphia, the condo management fee I'm paying is fairly high for the services, and it's because 2 of the owners (in a 4 units building) aren't paying their condo association fees.

The management is only getting paid by me and one other owner, which is enough to cover costs but ultimately the costs should split by 4, not by 2. The management isn't prompt in collecting on or warning the 2 non-paying owners. So me and the other owner are just covering the 2 non-paying owners. 

I plan to contact them once I figure out their contact information to see why they're not paying (maybe they have a good reason), one is an realtor/investor who has a tenant in there, and the other one seems vacant. The one other paying owner also seems to be an investor who rents it out and I plan to contact him as well as I figure he'd want to help me resolve this to reduce his payment as well.

I plan to work with the condo manager to collect from these owners and overall reduce my fee to its fair share of the building's expenses. I'm hoping that a quick communication/warning from the manager to the non-paying owners would do the trick but if not, I wonder a few things:

How easy/difficult it is to force the two non-paying owners to pay? can I/condo manager get a lien placed on the non-paying units? What if the manager isn't acting fast enough? How would you go about it?

The condo association agreement specifies how much each should pay and the condo manager has records of them not paying and a balance, so the ducks should be in a row for pursuing payment. Additionally, my unit is a little larger and has more than 25% voting rights so myself and one more owner should be able to make management changes if need be. 

Thanks in advance for your thoughts!