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New response options for webhooks
Update:
Introducing:
- New response options for webhooks to postpone our exponential backoff algorithm:
- HTTP 429 Too Many Requests
- HTTP 503 Service Unavailable
For more, please read about webhook delivery attempts: https://support.onlinefundraising.dk/hc/en-001/articles/5356624805916-Webhook-Delivery-Attempts
During 2026 we are improving our infrastructure and one element is our separation of webhook handling from the payment engine as previously announced: https://www.onlinefundraising.dk/developer/new-webhook-service/
The migration of webhook event types is still ongoing, but we expect it to be completed in September 2026.
The new webhook infrastructure allows batching of a configurable larger number of webhook payloads per webhook request, and an overall faster execution.
We understand some integrations are built to handle lower volumes at a slower pace and therefore introduce an option to respond with HTTP 429 or HTTP 503 with a Retry-After as described in our documentation.
- New response options for webhooks to postpone our exponential backoff algorithm:
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Replacement of DAWA with Adressevælger
Update:
Tags: DataSet APIIntroducing in June 2026:
addressValidatorandaddressIdin DataSet
Deprecating in September 2026:
dawa_idin DataSet
Fundraisers can choose to use various services to validate user inputs, including Business Code, National ID, Phone Number and Address.
In Denmark, we currently validate Danish addresses using Danmarks Adressers Web API (DAWA). However, DAWA is being deprecated on 17th of August 2026 and will be replaced by a new service called Adressevælger. For more, please see:
- https://dawadocs.dataforsyningen.dk
- https://dataforsyningen.dk/data/4924
- https://confluence.sdfi.dk/pages/viewpage.action?pageId=234782998
The two services operate somewhat differently, but share the same underlying address UUID. You can verify this by looking up our office address using the UUID
0a3f507b-4642-32b8-e044-0003ba298018:- DAWA (outgoing service): https://api.dataforsyningen.dk/adgangsadresser/0a3f507b-4642-32b8-e044-0003ba298018
- Adressevælger (replacing service) : https://adressevaelger.dk/husnumre/0a3f507b-4642-32b8-e044-0003ba298018?token=adressevaelger123 (token will expire by ultimo 2026)
As part of this transition, we are replacing the “
dawa_id” field in DataSet with a new field “addressId“, which is neither service nor country specific.If your integration relies on DAWA, please update it to use the new field “
addressId” along with the Adressevælger service.
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New Webhook Service
Update:
Introducing:
- Additional IP addresses sending Payment and DataSet webhooks:
63.182.150.2453.68.254.1303.126.194.2133.124.137.18
Integrators are encouraged to limit webhook requests from the IPs listed in this resource: https://info.onlinefundraising.dk/webhooks.json
Please check this at least once daily.
During 2026 Q2-Q3 we will gradually transition webhook event types to a new dedicated Webhook Service which will relieve the bottlenecks we have seen, which peaked in December 2025: https://status.onlinefundraising.dk/incidents/scxl4lwm38b6
For more, please see our documentation: https://support.onlinefundraising.dk/hc/en-001/articles/5356622578844-About-webhooks
- Additional IP addresses sending Payment and DataSet webhooks:
