Posted service can only be performed after receiving a judge's order.
Substitute Service in Mississippi must be to a family member, at least 17 years of age, who co-resides. Roommates and unmarried partners may not be sub-served, only relatives or spouses. After a substitute service, another copy of the documents must be mailed to the same address, by first class mail. The date of mailing must be written on the proof, otherwise the court will reject it.
Proofs of service must always be notarized, while proofs of non-service do not require it.