Monte dei Paschi (MPS) aims to launch a new share issue later this month for up to 2.5 billion euros ($2.5 billion) to fund the staff exits and lower its cost base from next year.
The unions said in a note that 4,015 requests related to an early retirement option which will see staff receive 80% of their salary for up to seven years before they reach the pension age.
MPS will take a few days to examine the requests following a meeting with unions on Tuesday, the note said.
Stormy markets pose a challenge to MPS' latest capital raising - its seventh in 14 years - with the banks managing the sale wary of the risk of unsold shares. ($1 = 1.0111 euros)
(Reporting by Silvia Ognibene, writing by Valentina Za; editing by Federico Maccioni and Louise Heavens)
