diff --git a/src/PdfCreator.ts b/src/PdfCreator.ts
index 549cf4f..8be61bb 100644
--- a/src/PdfCreator.ts
+++ b/src/PdfCreator.ts
@@ -10,6 +10,7 @@ import { PDFDocument } from 'pdf-lib';
 import puppeteer from "puppeteer";
 import { awaitAsyncHandlebarHelpers, helpers } from './asyncHelpers';
 import { config } from './config';
+import { CertificateRunner } from './models/CertificateRunner';
 import { Runner } from './models/Runner';
 import { RunnerCard } from './models/RunnerCard';
 import { RunnerGroup } from './models/RunnerGroup';
@@ -153,13 +154,38 @@ export class PdfCreator {
         await i18next.changeLanguage(locale);
         const template_source = fs.readFileSync(`${this.templateDir}/runner_card.html`, 'utf8');
         const template = Handlebars.compile(template_source);
-        let result = template({ cards, cards_swapped, eventname: "LfK! 2069", codeformat: "qrcode" })
+        let result = template({ cards, cards_swapped, eventname: config.eventname, codeformat: codeformat })
         result = await awaitAsyncHandlebarHelpers(result);
-        fs.writeFileSync("lelelelele.tmp", result);
         const pdf = await this.renderPdf(result, { format: "A4", landscape: false });
         return pdf
     }
 
+    /**
+     * Generate sponsoring contract pdfs.
+     * @param runner The runner you want to generate the contracts for.
+     * @param locale The locale used for the contracts (default:en)
+     */
+    public async generateRunnerCertficates(runners: CertificateRunner[], locale: string = "en"): Promise<Buffer> {
+        if (runners.length > 50) {
+            let pdf_promises = new Array<Promise<Buffer>>();
+            let i, j;
+            for (i = 0, j = runners.length; i < j; i += 50) {
+                let chunk = runners.slice(i, i + 50);
+                pdf_promises.push(this.generateRunnerCertficates(chunk, locale));
+            }
+            const pdfs = await Promise.all(pdf_promises);
+            return await this.mergePdfs(pdfs);
+        }
+        await i18next.changeLanguage(locale);
+        const template_source = fs.readFileSync(`${this.templateDir}/runner_certificate.html`, 'utf8');
+        const template = Handlebars.compile(template_source);
+        let result = template({ runners, eventname: config.eventname });
+        result = await awaitAsyncHandlebarHelpers(result);
+        const pdf = await this.renderPdf(result, { format: "A5", landscape: true });
+        fs.writeFileSync("lelelelele.tmp", pdf);
+        return pdf;
+    }
+
     /**
      * Converts all images in html to base64.
      * Works with image files in the template directory or images from urls.