There's something wonderful about wrapping up a longer term project, knowing you did your best, knowing the client is over the moon with your work, and feeling confident that they will recommend you to other people in their circle. That said sometimes your client needs a gentle nudge to put two and two together.
Client: "Oh! You'd like a referral?!"
You: "Wow, thanks so much!"
Also you: 🙄
Remember don’t pressure the client. Only send this off if it feels right.