Certified translation / interpretation is one that must be certified by a translator / interpreter entered into the list of sworn translators / interpreters kept by the Polish Minister of Justice.
more...

Non-certified translation is one that does not require certification by a sworn translator / interpreter.
It can be anything, from private correspondence through commercial offers, presentations or legal opinions to company strategy.  
more...

Non-certified interpretation is usually rendered during business meetings, training courses and conferences.
Types of interpreting services offered: consecutive, simultaneous (booth and chouchotage), escort interpreting.

more...