Always have it documented, preferably in the form of e-mails so that when time comes, you can display the same emails as the proof of communication. Money is the biggest motivator.
Daima kuwa ni kumbukumbu, ikiwezekana katika mfumo wa barua pepe ili wakati unakuja, unaweza kuonyesha barua pepe sawa na ushahidi wa mawasiliano.