The person making the claim must not be cohabiting either in order to make a claim for Widows/Widower's pension.
Contributory Widows/Widower's Pension can be claimed by persons living outside the state. Applications are made via the Social Security agency in the applicant's home country.
Widow's, Widower's or Surviving Civil Partner's (Contributory) Pension is paid to the husband, wife or civil partner of a deceased person. You or the deceased must have enough PRSI contributions.