the quote was taken from another thread about logging multi in the backseat. my question is there a length of time you have before you must put flights into your log book?:confused:

"Respondents argue that they intended to complete the flight
entries and sign the logbook to indicate when instruction was
given, but that they were behind in their paperwork." http://ntsb.gov/alj/alj/O_n_O/docs/aviation/4008.PDF