I am a UK resident with a bank account and apartment in the DR.I have just made a uk will and need to know whether that is sufficient or if I need one in the DR. I am single and have no children.
If your will is valid in the UK, it will be valid in the DR, subject to Dominican "forced heirship" provisions since Dominican real estate is governed by Dominican law.
One of the advantages for a non-Dominican of holding real estate in the Dominican Republic under a holding company is precisely to avoid the application of Dominican inheritance rules.
