Sayyidi wa sanadi Mufti Mohammed Taqi Usmani (Allah protect & preserve him) reprimanded a student who approached him for handshake saying very firmly,
‘It is an innovation (bida’t) to shake hand (musahafa) without saying the salaam (alaykum).
You did not say salaam and just barged in for handshake. ‘
Darul Uloom Karachi, after zohar-salat e janaza, Wednesday 21 August 2019