Ok, I get it. To answer your original question, I truncated the statute to the part that appeared relevant. Silly me. Here's the rest:
Rule 4.2 Process: Basis For and Methods of Out-Of-State Service
(a) Basis for Out-of-State Service.
(1) When Proper. Appropriate basis exists for service of process outside of this state upon a person in any action in this state when (A) the person is, at the time of the service of process, either a nonresident of this state or a resident of this state who is absent from the state, and (B) the person has sufficient contacts with this state, as set forth in subdivision (a)(2) of this rule, so that the prosecution of the action against the person in this state is not inconsistent with the constitution of this state or the Constitution of the United States, or, the person is sued in the capacity of executor, administrator, or other personal representative of an estate for the acts or omissions of a decedent or ward, and the person so sued does not otherwise have sufficient contacts with this state in that capacity, but the decedent or ward would have been deemed to have sufficient contacts with this state if the action could have been maintained against the decedent or ward.
(2) Sufficient Contacts. A person has sufficient contacts with the state when that person, acting directly or by agent, is or may be legally responsible as a consequence of that person's:
(A) transacting any business in this state;
(B) contracting to supply services or goods in this state;
(C) causing tortious injury or damage by an act or omission in this state including but not limited to actions arising out of the ownership, operation or use of a motor vehicle, aircraft, boat or watercraft in this state;
(D) causing tortious injury or damage in this state by an act or omission outside this state if the person regularly does or solicits business, or engages in any other persistent course of conduct or derives substantial revenue from goods used or consumed or services rendered in this state;
(E) causing injury or damage in this state to any person by breach of warranty expressly or impliedly made in the sale of goods outside this state when the person might reasonably have expected such other person to use, consume, or be affected by the goods in this state, provided that the person also regularly does or solicits business, or engages in any other persistent course of conduct, or derives substantial revenue from goods used or consumed or services rendered in this state;
(F) having an interest in, using, or possessing real property in this state;
(G) contracting to insure any person, property, or risk located within this state at the time of contracting;
(H) living in the marital relationship within this state notwithstanding subsequent departure from this state, as to all obligations arising from alimony, custody, child support, or property settlement, if the other party to the marital relationship continues to reside in this state; or
(I) otherwise having some minimum contacts with this state and, under the circumstances, it is fair and reasonable to require the person to come to this state to defend an action. The minimum contacts referred to in this subdivision (I) shall be deemed sufficient, notwithstanding a failure to satisfy the requirement of subdivisions (A)-(H) of this subsection (2), so long as the prosecution of the action against a person in this state is not inconsistent with the constitution of this state or the Constitution of the United States.
(3) "Person" Defined. This term "person" as used herein includes an individual, that person's executor, administrator, or other personal representative, or a corporation, partnership, association, or any other legal or commercial entity.
Now, the allegations of the Complaint will, in effect, allege that you qualify (and it appars that you do). If you feel that's not true but don't appear to refute them (because you don't believe you were properly served), the likelihood is that there will be an adverse judgment by default.
If you're right on the service issue, you can always raise that again, when they attempt to domesticate in CA. But you'll have to appear in court to do that and, even if you're right (and I don't think you stand a chance), they'll serve you personally, and the whole ugly mess will start again.
Beyond this, why don't you research AL statutes re: service and see if you can find an additional out-hole?