More than 4.5 million bus tickets will be printed over the next few weeks in the West Midlands to encourage domestic abuse victims to report attackers.
Police said the tickets, on services across Birmingham, Coventry and the Black Country, also warned offenders about jail sentences they could face.
Officers said numbers of attacks often rise at Christmas because of stress and people drinking more alcohol.
Posters will also be put up in pubs, hospitals and community centres.
Reports of domestic abuse to West Midlands Police between 1 December and 4 January have fallen in recent years to 2,694 last year from 4,382 in 2009-10.
However, West Midlands Police said they believed the actual numbers could be higher as some victims felt pressure to put on a "brave face" over Christmas and New Year.
Det Insp Kim Madill said: "Domestic abuse has traditionally risen at this time of year due to many factors - arguments over child contact, increased alcohol, family tension and financial pressures.
"Victims may feel pressure to 'hold it together over Christmas' - but domestic abuse shouldn't be tolerated at any time let alone over the festive season when people should be celebrating and enjoying themselves."