Import records with lookup field ids

Import records with lookup field ids

Hi

Is anyone able to import records into Recruit via spreadsheet / csv which contain ids as the lookup values. 

When importing from spreadsheet lookups will associate with the related records if using record name, however when using related records id in import file the lookup does not associate. 

For candidates/contacts using the name route is unusable as will have numerous with the same name who are different individuals. 

Have tried the id with the zrecruit_ prefix and without. 

Many thanks