If you want to avoid getting parking tickets in the future, you can download this app for smartphones which the City of Marbella uses – it is good for both iPhones and Android.
Only catch with this one is, that it is not all countries App Stores which can download the app – in 2014 it was only if you had access to the Spanish App Store. In 2016 you can also download it from the Danish App Store and perhaps other.
Once downloaded – you have to registre as a user. That again can be a bit tricky, as you need to have a DNI/CIF/NIE number, which again eliminates (most) tourists as users. The entire app and set-up is in Spanish, so if you are not able to read through the app, I would recommend to sit in front of a computer with google translate open.
I used 28 minutes to download and registre (with a NIE) and still I did not manage to get the app working – but I do know people who use it – and I use other parking apps on a regular basic, just not in Marbella or in Spain, so if you can get it up and running, it is really useful.
If you like me, have given up on this parking app, you can park for free at some designated areas in Marbella, take a look here.