Freelancer needs signing certificate

[iuliapana80]

Hey everyone,

I am really new in this domain, if you could help with this question.

I hired someone to develop an application with in-app purchases.

For coding the in-app purchases he asked for my certificate.

Is this normal?

I hesitated because it contains my private key, can he do something illegal with it?

I have an individual dev license, so I cannot create a team.

Thank you,
Iulia