Rita Translator wrote:
In case it's still relevant, it's just a form indicating that the agency was required to attest that the translators/editors (sub-contractors) with with whom they work fulfill certain qualifications (that could be that they are native speakers of the target language, have a degree in translation, have experience in the field, etc.), and this form is their proof to the client that you - the sub-contractor for this job - fulfill those qualifications. And yes, it also contains joint liability if you submit poor work, for example, but that joint liability is limited to the work you do ("...entsprechend dem Umfang der Eignungsleihe für die Auftragsausführung...").
As always with legal matters, this is an attempt at collegial assistance and not legal advice. You should consult a lawyer if you want to be certain. That having been said, I fill out these kinds of forms occasionally and it's pretty standard.
Many thanks, Rita. In the end, I checked with a lawyer and the advice was to cross out the parts about joint liability and pretty much most of the text, which I duly did. The agency were perfectly content with this, so all's well that ends well. Thanks again!