Law / Papers lost to claim pension in Poland [3]

My dad - a Polish citizen - has 20 years of work in Poland. He currently does not reside in Poland, but is now at the age where he is eligible to claim his polish pension. A few years ago, some relatives in Poland mailed all the required forms and papers to one of the ZUS offices in Poland, so that they could process them and calculate my dad's pension. But what we have just found out is that the ZUS office the relatives send the papers to does not deal with pensions, and it seems as though all the forms and papers have been lost.

Any advice on what we can do now? Yes, we can re-submit all the paperwork again, but the papers and forms the relatives send contained the original papers that my dad received from his work in Poland, and as far as I know you need the original papers from your work with your application. Is that true?