1 Start 2 Work 3 Provenance 4 Documentation 5 Credit Line 6 Complete

You have requested an assessment from Fondation Constant for the work or works of art described below, which you believe to have been created by Constant Nieuwenhuys (1920-2005). Hereafter called the "Work". All personal information will be kept confidential and requests for anonymity will be respected.

A written statement about the authentication of a work by Fondation Constant costs €100 administration fees. An oral statement is free.

To be able to examine the Work, we need a clear colour photograph of the entire work.

Files must be less than 10 MB.
Allowed file types: jpg jpeg png.

The following files can be send with WetransferPlus after finalization of the form:

  • a photo of the stretcher (backside)
  • a photo of the signature and date
  • a photo of any details, writings, stickers, comments on front or back
  • Other documentation

Fondation Constant also needs all information requested in the questionnaire below.

Please specify name of the owner.
Invoice Information