Answer
Based on official Jordanian legal texts
Establishing lineage does not change the custody rules themselves — it activates them. Before lineage is established there is no legal relationship between the child and the father on which custody or visitation arrangements could rest at all; once it is established, the full custody framework of the Personal Status Law applies.
What changes after lineage is established?
- The status of father attaches legally: he enters the statutory order of custody entitlement and gains visitation and accompaniment rights when not the custodian.
- The child's maintenance falls on the father: custody and maintenance are distinct — the custodial mother cares; the father pays.
- The relationship is judicially organized upon dispute: visitation schedules, accompaniment, and travel controls, under the child's best interest.
Does established lineage threaten the mother's custody?
The general rule in Jordanian law gives the mother priority in the custody of her young children while she meets the conditions — and that rule applies here as anywhere. Established lineage gives the father the position of a father — including seeking custody if the mother's conditions fail — but it does not flip the priority automatically. The governing standard is always the best interest of the child, assessed by the court on each case's circumstances.
An important practical angle
In undocumented-marriage situations, some mothers fear that proving lineage hands the father a "weapon" to take the child. The legal reality is usually the opposite: established lineage protects the child and secures maintenance and inheritance, while the mother's custody is preserved by its own independent rules. Withholding lineage out of custody fear harms the child and protects no one.
Every case has its own balance; specialist advice before acting charts the safest path for both child and mother.
This is a general answer based on available Jordanian legal sources and does not replace advice from a specialized lawyer in an actual dispute.