With signature requirements, the checking of signatures is necessary. The process is not only time consuming, but also open to abuse. This is especially true if, by law, only a (small) sample of the signatures is checked at random (e.g. Albania, Czech Republic, and the Russian Federation). This is why the Code of Good Practice in Electoral Matters recommends that the checking process must in principle cover all signatures (CDL-AD(2002)023rev2-cor, part. I. 1.3 iii). Only once it has been established beyond doubt that the requisite number of signatures has been collected, the remaining signatures need not be checked.