We've sold cars before and my take on manager's check is that it's ok as long as you bring the buyer with you to the bank and deposit it immediately or verify if it's a good MC. Dapat kasama si buyer and wag muna bibitawan ang papers and car unless verified na ang MC and na-deposit na sa account. My brother in law sold his car 3 years back and was paid a fake MC. The transaction was done on a saturday and when he deposited the MC in UCPB on a Monday, ayun fake daw and closed na daw nung 2005 pa yung account na pinanggalingan. From then on, pag nagbebenta kame ng cars, kelangan direct deposit sa account namin, meaning, samahan namin sya sa bdo and idedeposit nya kagad ang money sa account namin para sure.