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Donor Sibling Link (DSL)

Donor-conceived adults are able to exchange contact details with people who share the same donor through Donor Sibling Link. Find out more about Donor Sibling Link and how you can apply to join.

What is Donor Sibling Link and how does it work?

Donor Sibling Link allows people who share the same donor (donor-conceived siblings) to exchange contact details with one another.

Using information given to us by clinics we’re able to match you with your donor-conceived sibling(s) provided they’ve also joined Donor Sibling Link or they join in the future.

In order to be eligible to join, you need to be over 18 and have been conceived after 1 August 1991. 

Donor-conceived people who were conceived before 1 August 1991 can access information from the Donor Conceived Register. Please contact for more information about this.


Is there anything I should do before joining Donor Sibling Link?

We recommend applying to us first to find out if you do have any donor-conceived siblings. Not everyone will have donor-conceived siblings so it’s worth checking before taking the time to join Donor Sibling Link.

Apply for information

You might also want to think through some of the questions below to prepare yourself for potentially making contact with any genetic siblings:

  • Would you be disappointed if none of your siblings joined DSL? Many donor-conceived people may be unaware of their origins, may not know about Donor Sibling Link, or simply may not be interested in meeting other donor-conceived genetic siblings. 
  • Are you ready to potentially meet any donor-conceived genetic siblings? 




  • Are you prepared for the fact that your donor-conceived siblings may have very different lifestyles, attitudes and opinions to you?
  • What if you contact your donor-conceived genetic sibling(s) and they don’t respond?

We encourage you to talk these questions through with someone you trust, such as a family member or friend. Alternatively, we have a free and confidential support service where you can talk through all of these issues with someone experienced in donor conception.

Find out more about our free support service

I’m ready, how do I join Donor Sibling Link?

First, if you haven’t already, we recommend you apply to us for information on whether you have any donor-conceived siblings.

Then you’ll need to complete the DSL application form below.

Online application to join Donor Sibling Link (DSL) 

Or you may wish to complete the below form and post it to us via a trackable mail service along with your proof of ID and address (please see below for acceptable documents to use for proof):

Paper application to join Donor Sibling Link (DSL) 

Permitted ID and proof of address

You'll need to provide one proof of identification and one proof of address. We can only accept original identity documents, or copies that have been certified by a solicitor. We guarantee to return the originals within five working days by special delivery post.


Valid passport

Birth certificate (if your name has changed since this was issued, you also need to submit deed poll documentation or a marriage certificate)

Valid full or provisional UK driving licence photo card

Valid old style paper UK driving licence (containing your date of birth)


Address (dated within the last three months)

  • Utility bill
  • Council tax bill
  • Bank statement
  • Credit card statement
  • Payslip
  • NHS card


Where to send your completed application

Please post your completed application, proof of ID and proof of address to:

HFEA Information team

10 Spring Gardens



Once we’ve confirmed your eligibility, we’ll confirm your registration on DSL within 20 working days. We’ll also send you a unique PIN number which you can use to update your contact details with us so that we always have the most up to date information for you.

Who can I talk to if I have any questions?

We’re happy to help with any questions you might have. Drop us a line at and we’ll get back to you as soon as possible.


Review date: 3 July 2021

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