On the US side, depending on the raw material (that is what ultimately must be assessed), I have hassled the distributor for the documentation for a said approval program. But often I just go to the source, cutting out the distributor who often don't know what we are really asking for, if possible.
If you approve the supplier (required HACCP, 3rd party audit, etc...), I would stick to that format. If the distributor (acting as a supplier of Raw Material) can provide the documentation that you need, have them provide the source (if not available) and go to them. If not, one would have to drop this distributor's product for not passing your company's Supper Approval Program.
Not an easy sell to purchasing... but if one gets senior management to sign off as "these are the rules", purchasing/procurement or whoever deals with raw material ought to accountable to those criteria of approval.
This later half is rather important, senior management leadership backing is essential to its success.
Hope this gives you some ideas to consider.
-BGo to the full post