Did the request specify the country they want? In either case, they'll likely want one from the Netherlands, since you were there for an extended period of time.
I can speak to the process as my fiancee, the PA, lived in the Netherlands for one year. She is a US citizen and was there as part of her studies. According to IRCC's guides, we did not need to submit the Netherlands Police Report with our application, only her FBI Background Check (from the US).
Once IRCC began to conduct her Background Check (per MyCIC), she received an email from IRCC requesting the police check from the Netherlands - called a Certificate of Good Conduct (VOG). The reason we couldn't do it proactively is because the Netherlands needs a copy of IRCC's request in order to process it.
The email from IRCC details what you need to do to get the certificate. All the info can be found on the Netherlands Ministry of Justice site (it's also in English). Look for "Certificate of Good Conduct", which is called "Verklaring Omtrent het Gedrag" in Dutch.
Under section 2.3, check of box 06 (visa and emigration). Also, in section 1.1, the form has a box for "Prefix to surname". We had put "Ms.", but later found out that it's for "van", "van der", etc, which are common in Dutch surnames. Oops!
But they corrected it lol.
Before you send off your application, you'll need to prepay the fee (€41.35). As we are both in Canada, we needed a wire transfer from our bank. If you're in Sweden, it may be quicker. But get the confirmation of the transfer in writing. You need a copy of IRCC's email request, the completed application form, a copy of the PA's passport and a copy of the fee payment.
You can email the package, which I would highly recommend. We followed up a week later (called the Ministry and they spoke perfect English) and it was already processed and mailed
. We got it in just over a week ;D
Then you scan and reply to IRCC with the attached certificate. You don't need it translated as the bottom portion is in English.
Hope this helps!