Renting Property and Landlord Relations in Belarus: real experience from chats
Short answer
Russian citizens staying in Belarus over 90 days must obtain a temporary (RVP) or permanent (VNZh) residence permit, as temporary registration is insufficient. Apply for your VNZh based on your permanent property location and request a certificate of legal stay while your application is being processed.
From real experience
Russian citizens staying in Belarus longer than 90 days must obtain an RVP (temporary residence permit) or VNZh (permanent residence permit).
A simple temporary registration is insufficient. Applications for VNZh should ideally be submitted based on the location of your permanent residence (purchased property). While renovating, a temporary registration at your current rental is possible but does not extend legal stay beyond 90 days without RVP/VNZh. Upon application for VNZh, request a certificate confirming your legal stay during the processing period. Consult local migration offices (OGIM) for specifics.