Dear Liz: You recently answered a woman about collecting on her ex-husband’s Social Security record. You said she was eligible for a spousal benefit if they were married at least 10 years, which they were. I think you should have added that the spouse needs to be collecting their own Social Security when you apply. A Social Security rep told me I had to wait till my ex retired and then I’d automatically get the larger benefit. I waited. Eventually I asked my ex and he said he had started collecting Social Security some months previously. I applied and did get a retroactive payment.

Answer: Unfortunately, people don’t always get correct information from Social Security representatives.

You did not have to wait for your ex to begin receiving Social Security to apply for a divorced spousal benefit. While that’s a requirement for still-married couples — the primary worker must apply for their own benefit to trigger a spousal benefit — a divorced spouse has only to wait until their ex turns 62 and is eligible to receive Social Security retirement checks.

The representative you talked to may not have understood that you were talking about an ex rather than a current husband, or the rep may have been confused about the rules.

Because Social Security can be so complicated, it makes sense to educate yourself as much as possible about the rules. Books like Jonathan Peterson’s “Social Security for Dummies” can be helpful; just make sure to get the latest edition, since the rules for spousal benefits changed substantially in 2015.

Dear Liz: I’m about to turn 75. My wife is 67. I started collecting Social Security at age 70. My benefit is on the low side but I also get a union monthly pension. My wife is still working and planning to file for her Social Security benefit at 70, and she may get three times my amount. Is there a provision where I could be collecting a higher amount now based on her earnings?

Answer: Your wife would have to apply for her benefit before you would be eligible for a spousal benefit based on her work record. Once she applies, your spousal benefit would be 50% of her “primary insurance amount” — which is the benefit she would get at her full retirement age. For someone born in 1955, the full retirement age is 66 years and 2 months.

If she did apply now, your benefit might increase but she would miss out on the delayed retirement credits that would increase her checks by 8% for each year she puts off applying until age 70.

Generally, it’s a good idea for the person with the larger benefit to delay applying as long as possible, since it’s their check that determines what the survivor gets. But there are always exceptions, so you’d be smart to research your options. Social Security Solutions and Maximize My Social Security can help you model different claiming strategies, or you could discuss your situation with a financial planner.

Dear Liz: My ex-husband is 13 years younger than I. We were married for 10 years and he earns more than I do. If I start drawing my own Social Security benefit at age 70, can I switch to his benefit when I’m 75 and he is 62?

Answer: Normally when someone applies for Social Security, they’re “deemed” or assumed to be applying for all the benefits for which they’re eligible. If you’re eligible for your own retirement benefit as well as a divorced spousal benefit, for example, you would get the larger of the two amounts. You wouldn’t be able to switch from one to the other later.

There are a few exceptions to this rule, however, and your situation is one of them. You won’t be eligible for a divorced spousal benefit until your ex-husband reaches minimum retirement age (62). At that point, you would be eligible for 50% of his primary insurance amount, or the check he would get at his full retirement age, which is currently between 66 and 67. If that amount is larger than what you’re receiving, you could switch.

If you’re going to switch, though, you may not want to wait until 70 to apply for your own benefit. Delaying makes sense for most people, because they’ll live past the break-even age in their late 70s when the larger value of the delayed benefit more than makes up for the smaller checks they pass up in the meantime. If you switch at 75, though, you won’t have received your own benefits for long enough to make up for bypassing the smaller checks, says Dr. William Reichenstein, head of research at Social Security Solutions.

Deciding when to start Social Security can be tricky even in simpler situations than yours, so consider using a site such as Social Security Solutions or Maximize My Social Security for advice on when to claim.

Dear Liz: Does the Social Security Administration still allow a person to start taking Social Security benefits at age 62 and then later return the full amount received and begin taking the higher delayed benefits? For people who don’t need the income, this seems like a smart strategy as they could obtain the investment income on the benefits received from age 62 to 70 as well as the higher benefits amount starting at age 70.

Answer: Social Security closed that particular loophole in 2010.

As you know, Social Security retirement benefits increase each year you put off applying between age 62 and age 70, when benefits max out. An early start typically means a permanently reduced benefit.

Before 2010, people who started early, but who were able to repay all the money they received, were allowed to restart benefits at an older age and claim the larger checks as if they’d never applied before. This do-over prompted some recipients to apply early, invest the money and enjoy a kind of interest-free loan from the government.

People who make the mistake of starting Social Security too early still have a couple of options. They can withdraw their application for benefits within 12 months, but they are required to repay any benefits received, including benefits received by family members such as spousal or child benefits.

Another option is to wait until their full retirement age, which is currently between 66 and 67, and simply suspend their benefit.

No money has to be paid back and the recipient receives the delayed retirement credits that increase their benefits by 8% for each year they delay. Benefits will be automatically restarted at age 70, although the recipient can start them earlier, if desired.

Dear Liz: I understand your suggestion about waiting until you are 70 to apply for Social Security because you’ll get a larger amount. However, I applied at 62 and no matter how much more I would have received at 70, I would never recoup an amount equal to what I received. My husband chose to wait and died before he reached 70.

Answer: If your husband’s benefit was larger than your own, then his decision to delay was a real gift to you.

When one member of a couple dies, the survivor gets only the larger of the two Social Security benefits the couple used to receive. Losing one benefit can cause a sharp drop in the survivor’s income. That’s among the reasons why financial planners urge the higher earner to wait as long as possible: to maximize the benefit the survivor will have to live on for years or even decades.

If your husband had remained alive, then your early start could have been a mistake. Most people live past the “break even” point where the larger checks you could get from delaying more than outweighed the smaller checks you passed up in the meantime.