Usually when there is no written, things can become sticky.
It is normal to get you investment back and to become a partner?
I'm not sure if you're telling me that it is normal to get your investment back and become a partner above, or if you meant to ask is it normal?
As for whether is is normal, see below:
Relationship of Partners to Each Other
Each partner has a right to share in the profits of the partnership. Unless the partnership agreement states
otherwise, partners share profits equally. Moreover, partners must contribute equally to partnership losses unless a partnership agreement provides for another arrangement. In some jurisdictions a partner is entitled to the return
of her or his capital contributions
. In jurisdictions that have adopted the RUPA, however, the partner is not entitled to such a return.
Capital contribution - your investment. Notice that it states that in "some" jurisdictions, not all.
RUPA stands for Revised Uniform Partnership Act.
Other information that might be beneficial to you:
A partnership agreement is not a mandatory legal requirement for establishing a partnership. However, it is a very important step to ensure there are no misunderstandings between you and your partners. A well-drafted partnership agreement will help you decide in advance how to handle certain situations.
Here’s a list of some of the items that should be covered in your partnership agreement:
each partner’s contribution to the partnership
the allocation of profits, losses, and draws
the partners’ authority and management duties
how to admit new partners
what happens upon the bankruptcy
, withdrawal, or death of a partner, and
how to resolve disputes.