National Pension Insurance Administration Share on Facebook Share on Twitter ©Mss all rights reserved The national pension insurance fund(CNAP) allows you to apply online for a pension certificate or a tax return certificate for a previous year. Applications for old-age pensions or early retirement pensions can also be downloaded from Guichet.lu. Online applications for certificates Order a pension certificate Order a tax certificate for a previous year Apply online for an old-age or early-age pension Applying for an early old-age pension from the age of 57 or 60 Applying for an old-age pension from 65 years of age