PF: What kind of documentation can be used by beneficiaries to verify long-term residency?

As a very general principle, whatever supporting document is able to demonstrate with a reasonable level of certainty that someone is continuously legally residing in a EU Member State or a Horizon Europe Associated Country in a 5 years’ period, would be acceptable. To this purpose, a good advice for a beneficiary could be to request and verify the consistency between documents of different nature, for example registration in the national registry of the population, records of the police registration, utilities bills, etc.