It says victims often don't even realise the extent of the problem.
The Offaly Domestic Violence Support Service is reaching out to victims of coercive control, after Ireland's first conviction for the offence.
A man was jailed in Donegal yesterday, after pleading guilty to a number of charges, including making nearly 6,000 phone calls to his partner in a three month period.
The legislation, which became active last year, can include a combination of any form of domestic abuse.
Anne Clarke from ODVSS says the nature of coercion involves covert manipulation, which means victims often don't even realise the extent of the problem.
She advises how others can help flag issues in a relationship, like being forced to stay away from certain people or places: