Calderdale is one of 15 areas chosen by The Electoral Commission to be monitored in the run-up to elections next year.
Restrictions on postal voting and identity checks at polling stations may be needed to help crack down on fraud, the elections watchdog has said.
While cases of wrongdoing were limited, it said voters remained concerned and it would monitor 15 specific areas.
It is calling for police and electoral officers to toughen up procedures ahead of elections next year.
The commission is looking at a number of options to crack down on abuse of the system in Britain.
These include adopting measures such as restricting postal voting to constituents that are physically unable to come in person and forcing people to prove their identity at polling stations.
The areas being monitored also include: Birmingham, Blackburn with Darwen, Bradford, Burnley, Coventry, Hyndburn, Kirklees, Oldham, Pendle, Peterborough, Slough, Tower Hamlets, Walsall, and Woking.