prepared by duplicate vs prepared in duplicate

Both phrases are correct, but they are used in different contexts. 'Prepared in duplicate' is the more common and appropriate phrase when referring to making two identical copies of a document or report. On the other hand, 'prepared by duplicate' could be used in a specific context to indicate that something was prepared using a duplicate as a reference.

Last updated: March 31, 2024 • 1134 views

This phrase is correct in a specific context where something is prepared using a duplicate as a reference.

"prepared by duplicate"

This phrase could be used when indicating that a document or report was prepared by using a duplicate as a reference.

Show examples from the web [+]

Patients suddenly believe that their loved ones Have been replaced by duplicates.
This may be achieved by duplicate analysis of control and/or test materials.
On 10 April 2013 Ryanair submitted two notes prepared by the company Oxera and an analysis prepared by Professor Damien P. McLoughlin.
That photo was prepared by the best.
He analyzed several samples of zombie powder prepared by voodoo priests.
Norbixin is prepared by hydrolysis by aqueous alkali of the extracted bixin.
Quinoline Yellow is prepared by sulfonating 2-(2-quinolyl) indan-1,3-dione.
The financial statements shall be prepared by the accounting officer and presented in millions of euro.
It was prepared by Mr Randall.
Pro forma financial information must be accompanied by a report prepared by independent accountants or auditors.
You know, this beautiful Thanksgiving dinner was all prepared by Hannah.
The working document prepared by the Court itself contains alarming information.
If available, include statistics prepared by independent sources to illustrate the answer.
A document prepared by Dr. Zimmermann & Partner in September 1996 points to an extremely critical cash flow situation of the company.
The agenda of each session shall be prepared by the Director General.
We can also see this from the follow-up document prepared by the Commission.
Where necessary, this information shall be included in any safety data sheet prepared by him.
Charm prepared by a voodoo priest.
Moreover, it brings clarifies that the implementing rules could be prepared by different organisations.
Test solutions of the chosen concentrations are usually prepared by dilution of a stock solution.

Alternatives:

prepared with a duplicate

This phrase is commonly used when referring to making two identical copies of a document or report.

"prepared in duplicate"

This phrase is appropriate when indicating that a document or report has been prepared in two identical copies.

Show examples from the web [+]

A total of 12 positive samples shall be examined in duplicate and parallel dilutions prepared from the 10 ml initial suspension.
Fifty microlitres of a duplicate, twofold series of each test serum starting at 1/4 are prepared in U-bottomed multiwell plates (carrier plates).
Fifty microlitres of a duplicate, twofold series of each test serum starting at 1/4 are prepared in U-bottomed multiwell plates (carrier plates).
We use it in duplicate when we insure.
DOC and COD determinations are made at least in duplicate.
It is recommended that serum creatinine be assessed in duplicate before initiating therapy.
Done in duplicate at Brussels, 14 June 2010.
It's bad enough in Germany, everything in duplicate.
Standard solutions and sample extracts shall be tested at least in duplicate.
- pro forma invoice in duplicate;
The approved minutes shall be drawn up in duplicate and signed by the Secretaries.
DOC and/or COD concentrations are determined at least in duplicate in the samples according to 1.6.2 above.
Analysis must be carried out at least in duplicate.
The taxation form shall be completed in duplicate or triplicate, as necessary.
Tests to be made in duplicate at least.
This Agreement is drawn up in duplicate in English.
Analyse the standard solution (5.3) in duplicate by injecting 20 μl.
All the experiments, included controls and blanks, should be performed at least in duplicate.
This decision, done in duplicate, shall be signed by the Co-Chairs.
All plate determinations shall be done in duplicate.

Alternatives:

prepared as a duplicate
prepared with a duplicate copy
prepared in two copies
prepared twice

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prepared by duplicate vs prepared in duplicate