Frequently asked questions
Questions about sending brochures, credits or our API? We have put the most important answers together for you.
General
Slim Folderen is an innovative platform that makes sending brochures, welcome packs and mailings by post as easy as sending an email. We take care of printing, packing (including envelope and letter) and shipping to your customers, through our automated API and dashboard.
Our solution is built for B2B and e-commerce companies, estate agents, car dealers and all other organisations that want to use targeted physical mail as a conversion channel. It is designed especially for businesses that want to move away from expensive bulk mailings and prefer on-demand targeting. Slim Folderen is intended for business use, from freelancers to large organisations.
Yes, if your company is registered with the Dutch Chamber of Commerce (KvK). Companies with a valid, active KvK number receive 100 welcome credits once, for a free trial shipment: one copy of a brochure of up to 8 pages, to your own business address as registered with the KvK or to a business recipient you select through the KvK search. We check your KvK number automatically when you register. The offer applies once per company and once per person, phone number and email address. Bulk orders, campaigns and further shipments are paid for with purchased credits; welcome credits cannot be exchanged for money.
Yes. You can simply create an account, upload brochures and send them; you then pay with purchased credits. The free trial shipment is only available to companies with a valid KvK registration. As a new customer, you do get 20% off your first credit bundle. If your KvK number was not recognised when you registered, or you only get one later, you can still have it checked in your dashboard.
Pricing & credits
Loading prices…
If your balance is too low for a new shipment, the system pauses the order and you receive a notification. We recommend switching on auto-reload (automatic top-up) in your Wallet, so your campaigns never come to a standstill.
No. Credits are non-refundable and cannot be converted into cash or other credit. They do not expire, though: credits you have bought remain valid on your account indefinitely. If your agreement with us ends, any remaining balance lapses in accordance with our Terms and Conditions.
After every top-up, you immediately receive an invoice by email. Your Wallet also shows your transaction history, and you can download each invoice again there.
The entry price is €5.64 excl. VAT for 2 pages Budget to an address in the Netherlands, without volume discount. The lowest rate is €3.76 excl. VAT when you buy 10,000 credits (€799 excl. VAT). Per page: Budget 4, Standard 5 or Premium 6 credits, plus shipping (39 credits within the Netherlands).
Certainly. Administrators can give each team member a monthly budget in credits in the dashboard. That way you avoid unexpected costs and stay in full control of your marketing budgets.
No. For a bulk order to one address, we charge the shipping costs once for the whole shipment; you can see the rate in advance in the price calculator and when you order. Example: 100 eight-page Budget brochures = 100 × 32 + 39 = 3,239 credits, €388.68 excl. VAT at the standard rate.
Printing & delivery
If a brochure is requested on a working day before 3 pm, we print and pack it the same day. Within the Netherlands, PostNL delivers it to the recipient's doormat within 2 working days. International shipments within Europe take 2 to 5 working days.
Yes. Slim Folderen is print on demand from a single copy. You upload an A4 PDF and choose a recipient; we print, pack and deliver it via PostNL. There is no minimum order and there are no set-up costs.
A4 only (210 × 297 mm). We print stapled, full-colour brochures of 2 to 28 pages. When you upload, you choose Budget (100/80 g), Standard (120/100 g) or Premium (120/120 g).
Allowed: 2, 4, 8, 12, 16, 20, 24 or 28 pages. Stapled brochures are made from sheets folded to A4 (signatures). That is why 2 or 4 pages are possible, or a multiple of 4 up to a maximum of 28. Page counts of 6, 10, 14, 18, 22 or 26 are not accepted.
Bleed is 3 mm of extra image beyond the trim size. Without bleed, white edges appear after trimming. Supply your PDF at 216 × 303 mm (A4 plus 3 mm on each side), with crop marks as described in our specifications, or as a PDF with 3 mm bleed.
Yes. Supply files in CMYK, ideally at 300 DPI. RGB colours can look different on paper than on your screen. Convert in InDesign or Affinity, or use a print export from Canva.
Custom print jobs are not physically returned. Errors in your PDF, or an incorrect address you supplied yourself, are at your own expense. In the case of a demonstrable production error by Slim Folderen, we reprint at no cost or restore the credits, provided you report it within 14 days of delivery. See the terms and conditions.
Yes. Because we print purely on demand (only what you actually send), there is no more waste from outdated bulk stock. We also use FSC-certified paper as standard.
Yes. Besides individual shipments per recipient, you can place a bulk order of 10 to 2,500 copies in one shipment to one address, such as your office, a trade fair stand or an event venue. You pay for printing per copy and for shipping only once. You can do this during onboarding, and afterwards via “Oplage bestellen” (bulk order) on the dashboard.
Technical & integrations
Pipedrive, HubSpot, Salesforce, Zoho CRM, Microsoft Dynamics 365, Teamleader, Tribe CRM, Freshsales, ActiveCampaign, Copper, Close, Monday.com and Odoo. Their native webhook format is translated automatically.
Yes. In Pipedrive, create an Automation with the Webhook action (Advanced plan) and use your Slim Folderen URL with a "/" at the end. In the body, you add the name, address and email using the Pipedrive fields; if the full address is in a single field, we extract the postcode and city automatically. You will find the step-by-step guide with your webhook campaign.
Create a webhook campaign in your dashboard (“Campagnes” → “Webhook campagnes”). You get a unique URL that you paste into Zapier or Make as a POST webhook.
- Trigger: for example a new form submission or a new lead in your CRM
- Action: "Webhooks by Zapier" or Make "HTTP > Make a request" (POST)
- Map the fields:
naam,adres,postcode,plaats
Full guide: log in and go to “Support” → “Koppelhandleiding” (integration guide).
With webhook campaigns, Slim Folderen automatically receives shipping requests from Zapier, Make, your website or your CRM. You set rules (budget, a maximum of 1 per address, review required) so that mistakes and unexpected costs are prevented.
Required: name, address, postcode and town. Optional: company, country (default NL), email and a reference for your CRM.
Dutch field names (naam, adres, postcode, plaats) and English variants (recipient_name, etc.) are both supported.
When you create a webhook campaign, you can set a maximum of 1 shipment per address, a campaign budget in credits, a daily limit and the allowed countries. With review required, you first approve every request manually in the portal.
Yes. Connect Google Calendar (https://slimfolderen.nl/en/integrations/google-calendar/) or Microsoft Outlook (https://slimfolderen.nl/en/integrations/microsoft-outlook/). Upcoming appointments appear in the Calendar Assistant. You send brochures deliberately and manually, per attendee — never automatically.
Yes. Besides webhooks (the easiest route for Zapier/Make), you can also place orders directly via the REST API with an API key, which you create in the portal under “Integraties” (Integrations). Webhooks are intended for non-technical users; the API is for developers. See the API documentation (https://slimfolderen.nl/en/api-documentation/).
Can't find your question?
Our support team is ready to help you with technical integrations, invoicing or special shipping requests.