The incident, which happened in the early hours of March 28 after Northampton's win over London Wasps, brought Foden plenty of bad publicity but has not resulted in a ban of any sorts.
Foden featured in the following week's thrashing of Sale Sharks and is expected to start for his club in their Heineken Cup quarter-final clash with Ulster on Sunday.
But Foden will have to explain his actions the day after that European showdown after the RFU decided that Blackett would be best placed to decide whether any action should be taken against the star full back.
"As the national governing body for rugby in England, the Rugby Football Union expects all players to uphold the core values of the game," read an RFU statement.
"It notes that Ben Foden has accepted a police caution and has apologised for his part in the incident.
"Ben has now been asked to appear before the RFU disciplinary officer, Judge Jeff Blackett, next Monday afternoon.
"It should be noted that this is not an RFU disciplinary hearing, but an opportunity for Ben to explain his conduct."
Foden played in all five of England's Six Nations games this season and is expected to be a key member of Martin Johnson's starting XV at this autumn's World Cup.