There were no checks, right? So the logistics seem daunting. Did Cicero have this money in a bank or vault somewhere? Did he have slaves load the coins into wagons and drive them to Crassus's house/bank/vault? Did he get a receipt?
We've actually had a couple of users answer this very question before, and both of their answers are worth a read! /u/Alkibiades415 answers "Did the Roman Republic have a banking system" and /u/PiousHeathen answers "In 62 bc Cicero bought a house from Crassus for 3.5 million sesterces. How was that transaction executed? Seems like it would be a logistical nightmare. Did Cicero cart all that money across town and deliver it? Where was that money stored?"
Both of these users cover basically everything that I would say, but if they leave you with further questions, please feel free to ask and I'll be happy to answer your questions! :)
This may answer your question https://www.reddit.com/r/AskHistorians/comments/6en2mo/in_62_bc_cicero_bought_a_house_from_crassus_for/
I was also interested in this question and stumbled across this answer by /u/Alkibiades415:
https://www.reddit.com/r/AskHistorians/comments/65pkt0/_/dgcb4s4