To find a solution to every immigration query, that is our quest. Private individuals and companies alike, please be welcome to challenge us.

Direct contact

Call us You can reach us at
+31 (0)20 520 7050

LL.M., Ph.D Pieter Krop, partner

Pieter Krop is specialised in enforcement issues and European labour migration. Pieter litigates with success for companies and private individuals that have been fined because of alleged violation of the Act on Employment of Foreigners. He also advises clients on compliance issues.

Pieter Krop

His clients are, amongst others, companies working in construction, hospitality services , small and medium enterprises and employment agencies. He also advises clients on cross border labor and all other aspects of labor immigration.

He obtained his Ph.D. from the University of Amsterdam in 2014. The topic of his dissertation is the enforcement of illegal employment. He is a regular contributor for several academic magazines and teaches on labour migration at the University of Amsterdam. Pieter writes the comments on the Employer Sanctions Directive for the Sdu commentary on the Wet arbeid vreemdelingen (Alien Employment Act), and on the EU Blue Card Directive.


Fine imposed in violation of lex certa principle for work on cruiseship, in: JV 2020, 109
Fine for not cooperating with Labour Inspectorate
, in: JV 2020, 102
Fine for not informing in time Immigration Authorities that relationship is over
, in: JV 2020, 20
Proportionality of financiel penalties in the Dutch Aliens regulation
P.J. Krop en H. Verbaten in: JNVR 2019, 3
Penalties imposed by unreasonably acting of Dutch Labour Office in: JV 2019, 13
The burden of proof in intra EU cross border service provision in: JV 2018, 114
Proportionality and Penalties imposed based upn the Dutch Act on Employment of Foreigners in: JV 2018, 74
Financials penalties imposed to a chain of employers for illegal employment in: Bouwrecht, nr. 1, 2018.
Scientific publication on penalties (Dutch): Cumulatie van strafsancties, verblijfsrechtelijke en nationaliteitssancties in Nederland’, in: Rozie, J., Rutten, S. & Van Oevelen, A. (eds), Samenloop van strafrechtelijke, privaatrechtelijke en bestuurlijke sancties, Intersentia, Antwerpen – Cambridge, 2017
Evidence and administrative penalties in: JV 2017, 196
Penalty for German construction company and EU Law in: JV 2016, 270
Contribution to: Zwaan, Terlouw, Strik, Oosterom-Staples, de Lange, Krop, de Hart, Grütters, Fernhout, The Dutch migration law, Boom Juridische Uitgevers, Den Haag 2016
Penalty for real estate agent in: JV 2016, 173
Penalty for illegal employment. It is time for a real proportionality assessment in: A&MR 2016, 4
Penalty for illegal employment: ne bis in idem in: JV 2015, 102
Labour Inspection: research or investigation on illegal employment in: JV 2015, 61
Changes in admission of foreigners and high net worth individuals in: Legal Journal on Employment Law, 2014, nr. 12.
Contribution to: M. Mazzeschi, Mobility of non-EU workers within EU. Implementing Vander Elst, LexisNexis, 2014.
The enforcement of illegal employment (Phd), Boom Legal Publishers, 2014
Access to the labor market in: RV 2013, 50
Commentary to the Directive 2009/52/EU (Employer's Sanctions Directive), in: Comment to the Act on Employment of Foreigners, SDU Publishers, 2013
Crimmigration and Punishing the Poor in the Context of Employer Sanctions, 1st Crimmigration Control Conference, Coimbra, Portugal, 2012
Mitigation fine imposed for illegal employment foreigners and financial circumstances in: RV 2012, 46
Act on Employment of Foreigners and Nemo Tenutur in: RV 2011, nr. 47
Labour Tested Work Permits in: JV 2010, 401
Say Yes! Comment on administrative sanctions in the Act on Employment of Foreigners in: NJB 2010, nr. 23
EU Intra Company Transfer and Work Permit requirement in: SEW, 2010, nr. 182
Administrative fine for Illegal employent and criminal punishment in: JV 2010, 248
Employer's Sanctions Directive: Sanctions against employers of illegal third country nationals in: A&MR, 2009, nr. 8

In the media:
De Groene Amsterdammer, 3 February 2021 (Dutch weekly journal), Golden Visa. The trade in Dutch visas.
Financieele Dagblad 19 October 2020 (Dutch newspaper), Minstry of Social Affairs unrightfully impose high penalties for illegally employing foreigners.
Noordhollands Dagblad 15 October 2015 (Dutch newspaper), Secretary of State must amend height penalties.
Noordhollands Dagblad 16 December 2014 (Dutch newspaper), Mitigation fine for illegal painters.
Noordhollands Dagblad 12 September 2014 (Dutch newspaper), Fine for employing illegal painters 

T: +31 (0)20 520 7060
M: +31 (0)6 558 40 176


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Jelle Kroes

Jelle Kroes

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Sander Groen

Sander Groen

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Pieter Krop

Pieter Krop

Pieter Krop is specialised in enforcement issues and European labour migration....

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