Glossary entry (derived from question below)
Lithuanian term or phrase:
prokuristas
English translation:
authorised signatary
Lithuanian term
Australia
«I translate meaning, not just words.»
Native in: Lithuanian 
, English
Works in: Lithuanian to English, Spanish to English, French to English
prokuristas
| 4 -1 | an authorized representative |
LilianNekipelov
|
| 4 | agent |
The LT>EN Guy
|
| 4 | procurator |
Inga Jurkeviciute
|
| 2 | procurist |
Rimas Kriukas
|
Proposed translations
United States
Legal and literary translator. Linguist.
Native in: English (Variants: British, US) , Polish (Variant: Standard-Poland)
Works in: Russian to English, Polish to English, Swedish to English
an authorized representative
United Kingdom
Pro in legal and government-related docs
Native in: Lithuanian , English
Works in: Lithuanian to English
agent
Lithuania
Attentive quality for a reasonable price
Native in: Lithuanian
Works in: English to Lithuanian, Lithuanian to English
procurist
It might be that Lithuanians borrowed this word from another language, or simply some "wise" guy made a word formation from the word "to procure".
I have found some links from other languages below:
http://www.croatianpropertymanagement.com/real-estate-management/services/company-set-up/company-procurist
http://www.proz.com/kudoz/english_to_serbian/business_commerce_general/3165610-procurist.html
Italy
www.traduzionilituano.eu
Native in: Lithuanian
Works in: Italian to Lithuanian, Lithuanian to Italian, English to Lithuanian
procurator
Asmuo, kuriam išduota prokūra, yra prokuristas.
EN - procurator
A person who is issued a procuracy shall be a procurator.
procuracy=prokūra
Procuracy shall be a power of attorney, which a legal person (entrepreneur) grants to his employee or other person to perform, in principal’s name and in his interests, all legal acts related to legal person’s (entrepreneur’s) undertaking.
Prokūra yra įgaliojimas, kuriuo juridinis asmuo (verslininkas) suteikia teisę savo darbuotojui ar kitam asmeniui atstovaujamojo vardu ir dėl jo interesų atlikti visus teisinius veiksmus, susijusius su juridinio asmens (verslininko) verslu.
http://ec.europa.eu/translation/lithuanian/guidelines/docume...
Reference comments
United Kingdom
Pro in legal and government-related docs
Native in: Lithuanian , English
Works in: Lithuanian to English
Article 2.176, Civil Code
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Note added at 15 mins (2013-10-22 00:49:32 GMT)
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From what I've read about it before, it is an option present in the Civil Code that is largely unused. As personal powers of attorney almost always must have been notarized in Lithuania, a "prokūra" is a an alternative form of POA that is available only to legal entities and does not have to be notarized in any of the circumstances where personal ones have to.
This question has already been answered in German-English pair
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Note added at 1 day8 hrs (2013-10-23 09:09:57 GMT)
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The term 'procurist' is used in a book on Texas business law, see page 234 in:
http://books.google.lt/books?id=h917Cck_GO8C&pg=PA234&lpg=PA...
Discussion