The huwelijksbijlagen or huwelijkse bijlagen are the marriage supplements: the documents that a bride and groom had to submit to prove their identity and eligibility to get married.
See the article Marriage supplements: gateway to more information about your ancestors for more information about these records and how to use them for your own research.
![Man in uniform signing a document](https://www.dutchgenealogy.nl/wp-content/uploads/2013/10/HuwelijkAnnieJan-5-672x467.jpg)
Jan Marijnissen signs the marriage record of his sister-in-law Annie Flooren