Newlyweds, Arun and Abby, who both work Monday to Friday, have a new (post-honeymoon) "bundle of joy", Alan. Regardless of whether you have a mod that permits either parent to receive the maternity leave, one parent gets all the PTO - let's assume it's Abby.

Both parents are eager to help raise Alan, so on Monday, Abby stays home while Arun goes to work. Abby gets paid, using a day of her PTO. On Tuesday, Abby goes to work, while Arun stays home. Under normal circumstances, Arun would receive a message one hour before his coming home time that he'd missed a day of work and his job performance would decrease. With this mod, that message will not appear. Instead one day of PTO will be transferred from Abby to Arun, and Arun will be paid using that day of PTO.

Abby comes home from work and is promoted, her next promotion requires skills and friends, so on Wednesday she stays home to look after Alan and invites neighbours round (ostensible to coo over the new baby, but really to make new friends), while Arun goes to work. Abby will get paid, using her last day of maternity PTO.

On Wednesday night when Arun comes home, he has now worked enough days to gain a day of PTO. On Thursday, when Abby stays home to look after Alan (who is now a toddler) and hone her skills for the next promotion, she will not receive the message about missing work, but will use Arun's day of PTO and be paid.

Example 1: Newlyweds Connor and Claire have a new baby (thanks InTeen risky honeymoon!), the PTO has been assigned to Claire, but as she's about to get a promotion, she goes to work leaving Connor at home to change nappies. Instead of receiving the "Connor missed work today ..." message, one day of PTO is transferred from Claire to Connor and Connor takes a day of paid vacation.

Example 2: Janet and Sharon are sisters and live in their (dead) parent's house with their partners John and Simon (respectively) and their bundles of joy James and Sophie (respectively). As a result of a drunken one-night stand, John is the biological father of both James and Sophie. John and Simon have recently changed jobs and have no current PTO, Janet has 3 days of PTO and Sharon has 5 days of PTO. On Monday, Janet, Sharon and Simon go to work, leaving John to babysit. Instead of getting the "John missed work today ..." message, a day of PTO will be transferred from Sharon (as she has more PTO than Janet) to John and he will take a day of vacation. On Tuesday, Janet, Sharon and John go to work, leaving Simon to babysit. As he is not the biological father of either child, nor is he engaged/married to Sharon, he will get the "Simon missed work today ..." message and suffer the resulting loss of job performance.

Example 3: Richard and Rachel have adopted a toddler, Ryan. Rachel has no accrued PTO while Richard has 5 days PTO. Richard goes to work, leaving Rachel and Ryan to go shopping and then on to the park. Rachel will not receive the "Rachel missed work today ..." message as, despite not being the biological parent of Ryan, the game recognises her as his legal parent and so a day of Richard's PTO will be transferred to Rachel.

1a) Abby and Arun are newlyweds and, soon after returning from honeymoon, have a new addition to their family, Alan. Arun is keen to share the parenting, and can use Abby's PTO, under the "biological parent" rule

1b) Abby, realising she's made a huge mistake, runs off with the postie, Amanda. Arun can no longer use Abby's PTO as she is no longer a member of the family. To resolve this, the player places the "Shared Parenting Planner" somewhere on the lot and disables the "Family Check"

1c) Abby dies in a freak mail-machine accident. Arun can no longer use Abby's PTO as she is dead. To resolve this the player uses the "Shared Parenting Planner" to disable the "Parent Living" check (ghosts get to keep any PTO!).

2a) Bev, a teenage single mum of Beth, lives with her parents, Brenda and Brian, and her younger brother Bill (a sim child). Both Brenda and Brian can stay home from work to look after Beth, under the "parent of a parent" rule

2b) Bev applies for, and gets into, university, leaving Beth with her parents. Brenda and Brian can no longer use Bev's PTO as she is no longer a member of the family. To resolve this, the player places the "Shared Parenting Planner" somewhere on the lot and disables the "Family Check"

2c) Bill becomes a teen and takes a job at the local petrol station, which he hates. However, if he skives off night-shifts he CANNOT use Bev's PTO (as he's not a sibling of Beth, but a sibling of the parent of Beth) If the player wants Bill to use Bev's PTO they will have to give him a "Carer Card".

3a) Clive, a widower with a young son, Chas, and an older daughter, Clare, has fallen in love with his home-help, Chloe, and she has moved in. Chloe and Clive can use each other's PTO under the "two adults" rule.

3b) Clare becomes a teen and can use Clive's PTO under the "sibling rule", but Chloe no longer can (three adults in the family). Disabling "Teens are Adults" would re-enable Chloe, but the player wants Clare to help with Chas, so gives Chloe a "Carer Credentials Card" enabling her to use Clive's PTO again.

3c) Clive proposes to Chloe, and she accepts. Chloe no longer needs the "Carer Credentials Card", as she can use Clive's PTO under the "engaged/married to a biological parent" rule.

3d) Chas has become a sim child while Chloe has given birth to Christine. Clive can use Chloe's PTO to look after Christine as the biological father. If the player wants Clare to help with Christine, they will need to give her a "Carer Credentials Card" (as she is not a "sibling with a common parent" of Christine and there are now three adults in the family)

4a) Debbie and her toddler Dawn, Emily and her baby Ethan, Frances and her baby Florence all live with their "great-aunt" Gertrude. Gertrude is given a "Carer Credentials Card" so she can use any PTO the three women obtain

4b) Gertrude needs to go shopping, so employs a Nanny for the afternoon. However, the Nanny is still on the lot when the "missed work" check is performed by the game (one hour before coming home time). If the player has used the "Shared Parenting Planner" and enabled the "Nanny Check", Gertrude will not get paid for the day and her work performance will suffer

5a) Helen and Heidi are living together, but not engaged/married. Helen is the mother of teen Haylee; Heidi has baby Harold with a different father. For Helen or Haylee to be able to use Heidi's PTO to watch Harold they would need a "Carer Credentials Card", as neither are a blood relative and there are three adults in the family, also Helen is not in a relationship with Heidi

5b) Helen proposes to Heidi and she accepts. Helen no longer needs a Carer Card (as she is in a relationship with Harold's parent), but Haylee still needs the Carer Card if she is going to continue looking after Harold (while she is now is half-step-sister, there is still no blood tie)

6a) Iris (a plant sim) is married to Ivan; Iris has a plantbaby Izzy. Ivan can look after Izzy, under both the "2 adults" and "in a relationship with parent" rules.

6b) Izzy ages to adult and Ivan turns into a plantsim and produces a plantbaby, Imogen. As Izzy is not a "sibling with a common parent", she is unable to watch Imogen. To resolve this the player gives Izzy a "Carer Credentials Card" (The "ideal plantsim" being a parent of both Izzy and Imogen plays no part in forming blood relationships.)

7a) Janet and John have two teenage children (James and Jemima) and a toddler (Janice). Both Janet and John work afternoon to early evening, leaving before the teens return from school, so employ a Nanny. The teens should work afternoons, but have a tendency to "forget" to go to work. To stop the teens from using the parent(s) PTO, the player uses the "Shared Parenting Planner" and enables the "Nanny Check", such that if the teen also forgets to dismiss the Nanny, they won't get paid for "baby-sitting". (Unfortunately, if they do dismiss the Nanny, there is no way to stop them both getting paid and using two days of their parent(s) PTO. The player could disable "Include Teens As Adults", but then neither would get paid. Some scenarios just cannot be handled automatically)

As reported by LilSister @MTS

8a) Alana stayed home from work (she is an employee at her grandmother's herbal store), and her husband Adisa went to work (he is a soccer player). Alana never received a missed work notification and about 3:15 pm the message appeared that she stayed home to take care of the little ones and used one day of Adisa's vacation time. One day was deducted from Adisa's time and she got paid for the day. This mod makes it possible for Sims who work in Sim owned business to get PTO to care for their children contingent upon their spouse or significant other having a job that provides PTO.