in duplicate
As matching copies
In duplicate means in two identical copies.
Legal and business documents are often prepared in duplicate so each party retains an original: Please sign the contract in duplicate.
The phrase implies exact correspondence between copies, not an original and a photocopy.
- pairTwo matching things
- copyIdentical reproduction made
- twinOne of matched pair
- facsimileExact reproduction of original
- replicaFaithful scaled reproduction
two copies · exact copy · carbon copy · carbon paper · xerox · transcript · countercheck · photocopy · reproduction · backup · file copy · legal document · notarized · printout · clone · form · scan · match
uniqueness vs. replication
in duplicateuniquely
In unmatched fashion
one of a kind · singular · one-of-a-kind · singularly · unreplicated
duplicate, duplicates, duplicated, duplicating, duplication, duplicator, duplicity, duple, duplex