Source of funds check during golden visa application

Hi all. For members who have already received their golden visa residency cards, could you please describe how rigorously the Portuguese authorities vetted the sources of the funds you used to make investments? Because mine mostly come from gifts from my Russian parents. Parents are regular business owners in Russia having nothing to do with sanctioned industries, persons or companies. And Iโ€™m just wondering whether this could pose any problems. I myself have no connection to Russia-no citizenship, no residence, nothing.

AFAIK AIMA is not directly involved; the government set the regulations for bank account opening, banks implement this thru KYC and anti-money laundering processes.
Each bank will be different and varies based on the perceived risk (amount/citizenship/location of inbound funds etc)
In my case , UK source, I supplied documents to support source of funds, plus standard proof of address/2 utility bills/ tax number / passport.
So once you open the PT bank account and the investment amount is accepted (including AML checks) you should be good with annual refresh of KYC documents.
Maybe others with Russian connections have a different experience, I donโ€™t knowโ€ฆ.

There should be no issue if these gifts were coming in via wire transfers, i.e. if the funds you want to use are at your bank account now.
You can prepare the letters from your parents to be on a more safe side, but normally it is considered that the first bank which accepted the funds to your account should have performed the deeper check if required.